POISON-IVY, POISON-OAK, AND POISON SUMAC: IDENTIFICATION, PRECAUTIONS,
ERADICATION
By Donald M. Crooks, _principal horticulturist, Division of Tobacco,
Medicinal, and Special Crops_, and Leonard W. Kephart, _senior
agronomist, Division of Cereal Crops and Diseases, Bureau of Plant
Industry, Soils and Agricultural Engineering, Agricultural Research
Administration_