Oregon Agricultural Experiment Station Annual Report of Hop Investigations, written by Chester E. Horner, Agent (Plant Pathologist, USDA); Sam T. Likens, Agent (Chemist, USDA); Charles E. Zimmermann (Research Agronomist, USDA); Alfred Haunold (Research Plant Geneticist, USDA); G. B. Nickerson (Hops Chemist, OSU); J. F. Anderson (Assistant in Plant Pathology, OSU).
Oregon Agricultural Experiment Station Annual Report of Hop Investigations, written by Stanley N. Brooks, Agent (Research Agronomist, USDA); Chester E. Horner, Agent (Plant Pathologist, USDA); Sam T. Likens, Agent (Chemist, USDA); Charles E. Zimmermann (Research Agronomist, USDA); Alfred Haunold (Research Plant Geneticist, USDA); G. B. Nickerson (Hops Chemist, OSU).
Oregon Agricultural Experiment Station Annual Report of Hop Investigations, written by Stanley N. Brooks, Agent (Research Agronomist, USDA); Chester E. Horner, Agent (Plant Pathologist, USDA); Sam T. Likens, Agent (Chemist, USDA); Charles E. Zimmermann (Research Agronomist, USDA); Alfred Haunold (Research Plant Geneticist, USDA).
Oregon Agricultural Experiment Station Annual Report of Hop Investigations, written by Stanley N. Brooks, Agent (Research Agronomist, USDA); Chester E. Horner, Agent (Plant Pathologist, USDA); Sam T. Likens, Agent (Chemist, USDA); Charles E. Zimmermann (Research Agronomist, USDA); Alfred Haunold (Research Plant Geneticist, USDA).
Oregon Agricultural Experiment Station Annual Report of Hop Investigations, written by Chester E. Horner, Agent (Plant Pathologist, USDA); Sam T. Likens, Agent (Chemist, USDA); Charles E. Zimmermann (Research Agronomist, USDA); Alfred Haunold (Research Plant Geneticist, USDA); G. B. Nickerson (Hops Chemist, OSU).