Controlling weeds with fewer chemicals : how to cut your herbicide costs and protect the environment / edited by Craig Cramer... [et al]. - Emmaus, Pa : Rodale Institute, c1991. - 138 p. : ill. ISBN: 0913107158 LCCN: 92026252 Subjects--Topical Terms: Weeds--Control.Weeds--Cultural control.Conservation tillage.Herbicides.