Avalanches on the North Cascades Highway (SR-20)
By: Prepared [by] E. R. Lachapelle [and others.
Contributors: Washington State Highway Commission.
Publisher: Washington State Highway Dept.]
Published: 1971
Place of publication: Olympia
Language: eng
Number of pages: 65
Subjects: Avalanches -- Washington (State); North Cascades Scenic Highway (Wash.)
Notes: Cover title.

Prepared for Washington State Highway Commission, in cooperation with U. S. Federal Highway Administration.

Research project Y-1301.