 | Tracy, P. H. (Paul Hubert), 1894- 4n | (3) |
 |
 | Tracy, P. H. (Paul Hubert), 1894- 4n; Layouts and operating criteria for automation of dairy plants processing cheddar cheese / . Washington, D.C. : Agricultural Research Service, U.S. Dept. of Agriculture, 1971. | |
| Tracy, P. H. (Paul Hubert), 1894- 4n; Layouts and operating criteria for automation of dairy plants manufacturing butter and dried milk products / . Washington, D.C. : Agricultural Research Service, U.S. Dept. of Agriculture, 1970. | |
| Tracy, P. H. (Paul Hubert), 1894- 4n; Layouts and operating criteria for automation of dairy plants manufacturing cottage and cream cheeses and cultured milk and cream / by P.H. Tracy]. Washington, D.C. : Agricultural Research Service, U.S. Dept. of Agriculture, 1971. | |
|