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National Science Foundation; Engineering Foundation; Federal Highway Administration; American Iron and Steel Institute; Nuclear Research and Development. Composite Construction in Steel and Concrete II. Proceedings of an Engineering Foundation Conference. 1992
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National Steel Construction Conference. Proceedings. American Institute of Steel Construction. 1998
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National Symposium on Fiber Frontiers. June 10, 1974
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National Transportation Safety Board Meeting, January 24, 1977.
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National Volunteer Fire Council, International Association of Fire Chiefs, International Society of Fire Service Instructors. National Workshop for Volunteer Fire Service. Proceedings of the Stonebridge Conference. August 17-19, 1979
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National Workshop on Structures in Fire: State-of-the-Art, Research and Training Needs. Proceedings. June 11-12, 2007
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National of Building Sciences. International Conference on Building Use and Safety Technology. March 12-14, 1985
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Natural Disaster Reduction
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Natural Working Fluids '98 IIR-Gustav Lorentzen Conference. IIF-IIR Sections B and E. Proceedings. June 2-5, 1998
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Natural Working Fluids Conference, 6th IIR Gustave Lorentzen. Proceedings. August 29-September 1, 2004
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