Ecological investigation report
Subtitle: Oregon silverspot butterfly (Speyeria zerene hippolyta)
By: by David V. McCorkle with the assistance of Paul Hammond and Glory Penington.
Contributors: Hammond, Paul C.; Penington, Glory.
Publisher: Forest Service USDA, Pacific Northwest Region, Siuslaw National Forest
Published: 1980
Place of publication: [Portland? Or.]
Language: eng
Number of pages: 117
Subjects: Silverspot.; Butterflies -- Oregon.
Other titles: Oregon silverspot butterfly (Speyeria zerene hippolyta).
Notes: Two maps in pocket.

Includes index.

Bibliography: leaves 109-110.