The fungus gnats of North America
By: [O. A. Johannsen].
Series: Bulletin (Maine Agricultural and Forest Experiment Station) -- no. 172, 180, 196, 200
Publisher: Maine Agricultural Experiment Station
Published: 1909
Place of publication: Orono
Language: eng
Subjects: Mycetophilidae.; Diptera -- North America.
Other titles: The Mycetophilidae of North America.
Notes: Caption title: The Mycetophilidae of North America.