Periodical events and natural law as guides to agricultural research and practice
By: [by] Andrew Delmar Hopkins.
Contributors: Hopkins, A. D. 1857-1948.
Series: Monthly weather review. Supplement -- no. 9; Monthly weather review (United States. Weather Bureau) -- no. 9.
Publisher: Govt. Print. Off.
Published: 1918
Place of publication: Washington
Language: eng
Number of pages: 42
Subjects: Meteorology, Agricultural.; Phenology.; Meteorology -- United States -- Periodicals.
Genres: Periodicals.
Notes: "W.B. no. 643."

"Received Jan. 16, 1918. Issued May 1."