Gathercoal, E. N. (1933). The prescription ingredient survey: Consisting of the Ebert survey of 1885, the Hallberg survey of 1895, the Hallberg-Snow survey of 1907, the Charters survey of 1926, the Cook survey of 1930, the Gathercoal survey of 1930, the U.S.P. N.F. survey of 1931-32. American Pharmaceutical Association.
Chicago Style (17th ed.) CitationGathercoal, Edmund Norris. The Prescription Ingredient Survey: Consisting of the Ebert Survey of 1885, the Hallberg Survey of 1895, the Hallberg-Snow Survey of 1907, the Charters Survey of 1926, the Cook Survey of 1930, the Gathercoal Survey of 1930, the U.S.P. N.F. Survey of 1931-32. [Chicago?]: American Pharmaceutical Association, 1933.
MLA (9th ed.) CitationGathercoal, Edmund Norris. The Prescription Ingredient Survey: Consisting of the Ebert Survey of 1885, the Hallberg Survey of 1895, the Hallberg-Snow Survey of 1907, the Charters Survey of 1926, the Cook Survey of 1930, the Gathercoal Survey of 1930, the U.S.P. N.F. Survey of 1931-32. American Pharmaceutical Association, 1933.