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  1. List of workers in subjects pertaining to agriculture. Part 2. State agriculture colleges and experiment stations ... 1920-1921.
    By: United States. Department of Agriculture. States Relations Service.
    Publication info: Washington,Govt. Printing Office,1921.
    Contributed by: Library of Congress
    BHL Collections: Library of Congress
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  2. Some means of controlling insects, fungi, and other pests in Porto Rico /
    By: Van Zwaluwenburg, R. H. (Reyer Herman), - Thomas, H. E. (Harold Edgar), - Puerto Rico Agricultural Experiment Station. - United States. Department of Agriculture. - United States. Department of Agriculture. States Relations Service.
    Publication info: Washington :G.P.O. under the supervision of States Relations Service, Office of Experiment Stations, U.S. Dept. of Agriculture,1918.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
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