scientific article published in 1971

scientific article published in 1961

scientific article published in 1958

scientific article published in 1973

scientific article published in 1973

scientific article published in 1971

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scientific article published in September 1946

scientific article published in 1972

article by John Thomas Howell published 1931 in Madroño

scientific article published in 1970

article and obituary published May, 1954

scientific article published in 1971

scientific article

scientific article published in 1931

scientific article published in 1958

scientific article published in 1944

collected botanical notebooks of John Thomas Howell

San Fransisco:[J. T. Howell],1932-1966. | New York Botanical Garden, LuEsther T. Mertz Library

scientific article (publication date: May 1971)

scientific article published in 1972

scientific article published in 1930

scientific article published in 1931

scientific article published in 1971

scholarly article

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scientific article published in 1950

scientific article published in 1950

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scientific article published in 1931

scientific article published in 1931

scientific article published in 1929

article by John Thomas Howell published 1929 in Madroño

scientific article published in 1967

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scientific article published in January 1964