Dairy science; its principles and practice in production, management, and processing,

by 104719 Petersen, William Earl, 1892-, 73768 Gregory, R. W. (Raymond William), 1893- ed.
Published [c19

Productive farm crops,

by 95647 Montgomery, E. G. (Edward Gerrard), 1878-, 73768 Gregory, R. W. (Raymond William), 1893- ed.
Published [c19