Front matter
Reading edition
UNITED STATES DEPARTMENT OF AGRICULTURE
BULLETIN No. 844
Contribution from the Bureau of Plant Industry
WM. A. TAYLOR, Chief
Washington, D. C. PROFESSIONAL PAPER August 11, 1920
Reading edition
UNITED STATES DEPARTMENT OF AGRICULTURE
BULLETIN No. 844
Contribution from the Bureau of Plant Industry
WM. A. TAYLOR, Chief
Washington, D. C. PROFESSIONAL PAPER August 11, 1920