How to plan a conservation education programDavid S. Wood, Diane Walton Wood, Edward McCrea, Laurie S. Z. Greenberg, Center for International Development and Environment (World Resources Institute), U.S. Fish and Wildlife Service. Office of International Affairs · First published 1990Open the Tome
A Directory of selected environmental education materialsEdward J. McCrea, Laurie S. Z. Greenberg, College of Environmental Science and Forestry, World Resources Institute, U.S. Fish and Wildlife Service · First published 1988Open the Tome
Determination of unknown parameters in a general, linear, 2X2, analytic system of ordinary differential equationsMichael Edward McCrea · First published 1986Open the Tome
