Two species of Valsa causing disease in Populus
By: by Ernst J. Schreiner ...
Published: 1931
Place of publication: [Brooklyn
Language: eng
Number of pages: 29
Subjects: Valsa.; Poplar -- Diseases and pests.
Notes: "Literature cited": p. 26-27.
Thesis (Ph. D.)--Columbia university, 1931.
Vita.
"Reprinted from the American journal of botany, 18 ... 1931."
Cover-title.