Alfalfa and alfalfa improvement / A. A. Hanson, editor ; D. K. Barnes, co-editor, R. R. Hill, Jr., co-editor. — Madison, Wisconsin, USA : American Society of Agronomy, c1988.
xxvi, 1084 p. : il. ; 24 cm. — (Agronomy ; nº 29)
ISBN 089118094X