@article{Miller:138109, recid = {138109}, author = {Miller, Jeffrey L.}, title = {Agricultural Letter}, journal = {Agricultural Letter}, address = {1981-05-29}, number = {820-2016-53224}, series = {1552}, pages = {4}, month = {May}, year = {1981}, url = {http://ageconsearch.umn.edu/record/138109}, doi = {https://doi.org/10.22004/ag.econ.138109}, }