@article{Hayami:260195, recid = {260195}, author = {Hayami, Yujiro and Ruttan, V.W. }, title = {AGRICULTURAL PRODUCTIVITY DIFFERENCES AMONG COUNTRIES}, address = {1971-10-25}, number = {1920-2017-2324}, pages = {26}, year = {1971}, url = {http://ageconsearch.umn.edu/record/260195}, doi = {https://doi.org/10.22004/ag.econ.260195}, }