1
Published: 1927
Superior document: Bulletin / Agricultural Experiment Station / University of California, Division of Agricultural Sciences 432
2
The principles of cooperation and their relation to success or failure / H. E. Erdman ; J. M. Tinley
Published: 1957
Superior document: Bulletin / Agricultural Experiment Station / University of California, Division of Agricultural Sciences 758
3
Published: 1957
Superior document: Bulletin / Agricultural Experiment Station / University of California, Division of Agricultural Sciences 759
4
Published: 1929
Superior document: Bulletin / Agricultural Experiment Station / University of California, Division of Agricultural Sciences 475