| WebElements__Technetium Extensive information on history, uses, occurrence, compounds, and properties. |
| Wikipedia__Technetium Properties of the element, including its history, applications, and characteristics. |
| Radiochemistry_of_Technetium Full text of the monograph by Edward Anders (Enrico Fermi Institute and Dept. of Chemistry, University of Chicago, Chicago, Illinois). [PDF format] (November, 1960) |
| ChemicalElements_com__Tungsten Basic information, atomic structure, and isotopes. |
| ChinaTungsten_Online Basic properties, compounds, brief history, information about production processes. |
| EnvironmentalChemistry_com__Tungsten Atomic structure, chemical and physical properties, and table of nuclides. |
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| LANL__Tungsten Basic information and history. |
| Lenntech__Tungsten Physical data, chemical properties, health and environmental effects. |
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| USGS_Minerals_Information__Tungsten Statistics and information on the worldwide supply, demand, and flow of the element (PDF format). |
| Visual_Elements__Tungsten Image, general and physical information, source, uses, key isotopes, and ionisation energies. |
| WebElements__Tungsten Extensive information on history, uses, occurrence, compounds, and properties. |
| Wikipedia__Tungsten Properties of the element, including its history, applications, and characteristics. |
| Radiochemistry_of_Tungsten Full text of the monograph by G. W. Leddicotte (Oak Ridge National Laboratory, Oak Ridge, Tennessee). [PDF] (September, 1961) |
| Nature__A_handful_of_hassium Abstracts of articles about chemical investigation and properties of seaborgium, bohrium, and hassium. |
| Transactinides Introduction, production, single-atom chemistry, and results. |
| Prospects_for_the_study_of_Transactinides The presentation by S. Hofmann. [PDF] (April 1, 2004) |
| Chemical_Properties_of_Transactinide_Elements An article by P.K. Mohapatra. [PDF] (2003) |
| ChemicalElements_com__Copper Basic information, atomic structure, and table of isotopes. |
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| EnvironmentalChemistry_com__Copper Atomic structure, chemical and physical properties, and table of nuclides. |
| It\'s_Elemental__Copper Basic physical and historical information. |
| LANL__Copper History, properties, sources, and uses. |
| Lenntech__Copper Physical data, chemical properties, health and environmental effects. |
| USGS_Minerals_Information__Copper Statistics and information on the worldwide supply, demand, and flow of the element (PDF format). |
| Visual_Elements__Copper Image, general and physical information, source, uses, key isotopes, and ionisation energies. |
| WebElements__Copper Extensive information on history, uses, occurrence, compounds, and properties of the element. |
| Wikipedia__Copper Properties of the element, including its history, applications, and characteristics. |
| Radiochemistry_of_Copper Full text of the monograph by F. F. Dyer (Oak Ridge National Laboratory, Oak Ridge, Tennessee). [PDF] (April, 1961) |
| Rob_Walrecht_Planispheres Planispheres for various latitudes for northern and southern hemispheres and in various languages as well. Also customized planispheres. |
| ASSE_The_American_Society_of_Safety_Engineers Founded in 1911, ASSE is the world's oldest and largest professional safety organization. Its 33,000 members manage safety, health and environmental issues in industry. |
| Los_Angeles_Chapter_ASSE American Society of Safety Engineers: executive board, history, information, territory served, membership requirements, past presidents, by-laws, contact numbers. |
| National_Institute_for_Occupational_Safety_and_Health_(NIOSH) As part of the CDC, NIOSH is responsible for conducting research and making recommendations for the prevention of work-related illnesses and injuries. |
| Northeast_Product_Safety_Society_(NPSS) Product safety engineers sharing product safety information. Organization overview, news, event and program information,. |
| Product_Designers\'_on-line_Guidebook_to_IEC_60950 i-Spec IT is an on-line guidebook for IEC 60950, the product safety standard for ITE. It helps electrical and electronic product designers comply with technical requirements for UL and CE Marking. |
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| PenMap Penmap, Pen Based Surveying System, software for: Land Surveying, Civil Engineering, Building Construction, Road Construction. Police Accident Investigation, Archaeology, and Geology. |
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