The cultivated hemlocks
By: John C. Swartley ; revised by Humphrey J. Welch ; technical editor, Theodore R. Dudley ; biographical essay about the author by Robert L. Fincham.
Contributors: Welch, H. J.; Dudley, T. R. 1936-
Publisher: Timber Press
Published: 1984
Place of publication: Portland, Or
Language: eng
Number of pages: 186
Subjects: Eastern hemlock -- Varieties.; Tsuga.; Dwarf conifers -- Varieties.
Notes: Bibliography: p. 183-186.
A revision of the author's thesis (M.S.--Cornell, 1939) originally issued under the title: Canadian hemlock and its variations.