Recently introduced varieties of head lettuce and methods used in their development /
by G.W. Bohn and Thomas W. Whitaker.

APA Citation

Bohn, G. W. (Guy Weston)., Whitaker, T. W. (Thomas Wallace). (1951). Recently introduced varieties of head lettuce and methods used in their development. Washington, D.C.: U.S. Dept. of Agriculture.

MLA Citation

Bohn, G. W. (Guy Weston), 1909-, and Thomas W. (Thomas Wallace) Whitaker. Recently Introduced Varieties of Head Lettuce And Methods Used In Their Development. Washington, D.C.: U.S. Dept. of Agriculture, 1951.