NALDC

Main content area

MLA

Roberts, John W. (John William). Apple scab. U.S. Dept. of Agriculture, 1926.

APA

Roberts, John W. (John William). (1926). Apple scab. U.S. Dept. of Agriculture.

Chicago

Roberts, John W. (John William) Apple scab. U.S. Dept. of Agriculture, 1926.