San Francisco Bay : use and protection. An investigation into Man's activities and impacts on San Francisco Bay, government and private responses to those impacts, and prospects for its future use and protection Author(s) Kockelman, William J. Conomos, T. John Leviton, Alan E.
Conservacion ambiental en El Salvador : recomendaciones para un programa de accion nacional Author(s) Daugherty, Howard E.
Wild in Gehegen : Haltung, Ernährung, Pflege, Wildnarkose Author(s) Hatlapa, Hans-Heinrich M. Heinrich III, Prince of Reuss
Environmentally significant areas of the Yukon Territory Author(s) Theberge, John B. Nelson, James Gordon Fenge, Terry
