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Subject
- 25 Frost
- 25 Frost action
- 25 Frost heave
- 25 Frost heaving
- 25 Soils
- 21 Airfields
- 20 Runways
- 17 Pavement bases
- 17 Pavements
- 15 Frozen ground
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Date issued
- 13 1950 - 1958
- 17 1945 - 1949
Has File(s)
- 30 true