The thornless prickly pears /
by David Griffiths.

APA Citation

Griffiths, D. (1912). The thornless prickly pears. Washington, D.C.: U.S. Dept. of Agriculture.

MLA Citation

Griffiths, David, 1867-1935. The Thornless Prickly Pears. Washington, D.C.: U.S. Dept. of Agriculture, 1912.

Warning: These citations may not always be complete (especially for serials).