Autor
Gunst, Richard F.
2
Bacon, Francis
1
Crew, F. A. E.
1
Darlington, Cyril Dean
1
Estados Unidos. Department of agriculture
1
Fowler, Thomas
1
Gardner, Eldon J.
1
Geerts, S.J
1
Hess, James L.
1
Li, Ching Chun, 1912-
1
Mason, Robert L.
1
Masson, Robert L.
1
Mather, K.
1
McGraw-HillL pub (New York, Estados Unidos)
1
Mix, Paul E.
1
Strickberger, Monroe W.
1
Wheeler, Donald J.
1
Williams, Watkin
1