Instructions for aerological observers.
By: By W. R. Gregg, in charge, Aerological division, assisted by Messrs. V. E. Jakl, W. S. Cloud, L. T. Samuels, and R. C. Lane.
Contributors: Cloud, W. S.; Gregg, Willis Ray, 1880-1938.; Jakl, Vincent Edward, 1880-; Lane, Russell Charles, 1893-; Samuels, Leroy Thomas, 1893-
Publisher: Govt. print. off.
Published: 1921
Place of publication: Washington
Language: eng
Number of pages: 115
Subjects: Meteorology -- Observers' manuals; Aeronautics in meteorology
Genres: Observers' manuals.
Notes: At head of title: W.B. 740. U.S. Dept. of agriculture. Weather bureau.

1928 edition has title: Instructions for making pilot balloon observations (Circular 0); 1930 edition, Instructions for making aerological observations (Circular P) 1W371.