Some means of controlling insects, fungi, and other pests in Porto Rico

Author: 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.
Publisher: Washington,GPO under the supervision of States Relations Service, Office of Experiment Stations, US Dept of Agriculture 1918

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