A Study of the I-15 corridor in the vicinity of Helena, Montana
By: for the Montana Department of Highways, Planning and Research Bureau ... prepared by Henningson, Durham & Richardson, Inc
Contributors: Montana. State Highway Commission. Planning Survey Division
Publisher: Henningson, Durham & Richardson
Published: 1980
Place of publication: Helena, Mont
Language: eng
Subjects: Roads
Other titles: Corridor study, Interstate 15, Helena, Montana.
Notes: Cover title: Corridor study, Interstate 15, Helena, Montana.