The cause and permanence of size differences in apple trees
By: [Karl Sax and John W. Gowen]
Contributors: Gowen, John W. (John Whittemore), 1893-
Series: Bulletin / Maine Agricultural Experiment Station --       310
Publisher: Maine Agricultural Experiment Station
Published: 1923
Place of publication: Orono
Language: eng
Subjects: Growth; Apples
Notes: Bibliography: p. 8.