1
Cyhoeddwyd: 1908
Superior document: Bulletin / Agricultural Experiment Station / University of California, Division of Agricultural Sciences 199
2
Cyhoeddwyd: 1904
Superior document: Bulletin / Agricultural Experiment Station / University of California, Division of Agricultural Sciences 161
3
Cyhoeddwyd: 1904
Superior document: Bulletin / Agricultural Experiment Station / University of California, Division of Agricultural Sciences 156