First and second editions were published for the country elevator section of the Grain Trade only. The general edition was completely revised in 1939 to serve all sections of the Canadian Grain Trade. The 1939 and 1948 General editions cannot be used with any previous edition of the DRP Grain Code
During the independent existence of Manitoba Pool Elevators, the Manitoba Co-operator, published by the Manitoba Co-operative Conference Ltd., was the official organ of the cooperative movement in the province. The sub-series consists of issues of The Manitoba Co-operator from 1931-1936 and 1943-2001.
