Spruce bud worm and spruce leaf miners
By: [O.A. Johannsen]
Series: Bulletin / Maine Agricultural Experiment Station -- no.       210
Publisher: Maine Agricultural Experiment Station
Published: 1913
Place of publication: Orono
Language: eng
Number of pages: 36
Subjects: Spruce; Spruce budworm; Leafminers; Diseases and pests
Notes: Bibliography: p. 31.