U.S. Environmental Protection Agency Office of Research and Development, Center for Environmental Research Information, Robert S. Kerr Environmental Research Laboratory
Committee on Enhancing Science and Engineering in Prekindergarten Through Fifth Grades ; Board on Science Education ; Division of Behavioral and Social Sciences and Education
prepared by U.S. Department of Commerce, National Oceanic and Atmospheric Administration, Office of Coastal Zone Management in cooperation with U.S. Department of the Interior, Heritage Conservation and Recreation Service
prepared by the Congressional Research Service, Library of Congress for the Subcommittee on Natural Resources, Agriculture Research, and Environment of the Committee on Science and Technology, U.S. House of Representatives, Ninety-eighth Congress, first session