Work carried on during past few years by U. S. Forest Service in developing highways and trails; influence of improved roads on development of national parks and in reduction of forest fires; wild life assets of national parks; tabulation of forest road and trail mileages and expenditures by States.
New roads and trails opening our national forests
Explosives Engr
Explosives Engineer ; 7 , n 9
1929
4 pages
9 Figs.
Article (Journal)
English
© Metadata Copyright Elsevier B. V. All rights reserved.
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