ECOLOGICAL PRINCIPLES OF AGRICULTURE
DR. LAURA E. POWERS/ DR. ROBERT MCSORLEY
ECOLOGICAL PRINCIPLES OF AGRICULTURE - AFRICA DELMAR 1999 - XI,433PG,ILLUS PBK
0766806537
S 589 .P6 1999
ECOLOGICAL PRINCIPLES OF AGRICULTURE - AFRICA DELMAR 1999 - XI,433PG,ILLUS PBK
0766806537
S 589 .P6 1999