Egg production costs and returns in western OregonManning H. Becker · First published 1956Open the Tome
Factors affecting farm earnings and organizationManning H. Becker · First published 1949Open the Tome
Sprinkler irrigation costs for vegetable crops in the Willamette Valley, OregonManning H. Becker · First published 1949Open the Tome
Some aspects of sprinkler irrigation costs for vegetable crops in the Willamette ValleyManning H. Becker · First published 1948Open the Tome
