In August the Soviet government agreed to the second one-year extension of the US-USSR grain agreement, which has regulated grain trade between the two countries since 1976. Although a net exporter of grain for the best part of this century, the USSR has become increasingly dependent on imports...

[nebst]: Suppl ... Mathematical models, proofs, methods of data collection and estimation and supplementary tables. U.S. Department of Agriculture, Agricultural Research Service. Wash., D. C., June 1961. 58 S