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Gravel road maintenance costs in Minnesota
Maintenance of unpaved trunk highways cost from $523 to $2187 per mile in 1927, according to figures given out by state highway commissioner of Minnesota.
Gravel road maintenance costs in Minnesota
Maintenance of unpaved trunk highways cost from $523 to $2187 per mile in 1927, according to figures given out by state highway commissioner of Minnesota.
Gravel road maintenance costs in Minnesota
Highway Engr. Contractor
1928
Article (Journal)
English
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