Agroecology : ecological processes in sustainable agriculture / Stephen R. Gliessman ; editor, Eric Engles ; technical illustrator, Eric Engles ; contributing writer, Robin Krieger. Gliessman, Stephen R. Engles, Eric. Krieger, Robin. Agricultural ecology. Sustainable agriculture. Agricultural systems. S589.7 .G58 1998 630.277 GIA Includes bibliographical references (p. 327-337) and index. Chelsea, MI : Ann Arbor Press, c1998. c1998. 1998 Text xxiii, 357 p. : http://www.loc.gov/catdir/enhancements/fy0646/97033979-d.html eng