Reviews results published in a bulletin of the U. S. Forest Service which indicate that treatments have generally increased the durability of the ties. (2000 w.) (No. 39984)
Service tests of ties in experimental track
Ry Age Gaz
1913
Aufsatz (Zeitschrift)
Englisch
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Engineering Index Backfile | 1930
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Engineering Index Backfile | 1931
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Engineering Index Backfile | 1933
Engineering Index Backfile | 1926