Because there is insufficient freight to justify railway in northern Canada and because airplanes cannot carry all heavy freight, tractors fill definite need for both short and long hauls; American made Diesel powered tractors mainly used.
Canada's tractor freight trains
Diesel Power
Diesel Power ; 16 , n 10
1938
2 pages
Article (Journal)
English
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Engineering Index Backfile | 1955
British Library Online Contents | 2000
|Engineering Index Backfile | 1907
Industrial tractors and tractor trains
Engineering Index Backfile | 1938
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