@article{Benjamin:138944, recid = {138944}, author = {Benjamin, Gary L.}, title = {Agricultural Letter}, journal = {Agricultural Letter}, address = {1976-07}, number = {820-2016-53084}, series = {1388}, pages = {2}, year = {1976}, url = {http://ageconsearch.umn.edu/record/138944}, doi = {https://doi.org/10.22004/ag.econ.138944}, }