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7
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Timber : its strength, seasoning, and grading / by Harold S. Betts.
- McGraw-Hill [etc.],
- 1919.
- New York [etc.] :
-
The chemistry of India rubber : including the outlines of a theory on vulcanisation / by Carl Otto Weber.
- Griffin,
- 1919.
- London :
-
Untersuchungen über die natürlichen und künstlichen Kautschukarten / von Carl Dietrich Harries.
- Springer,
- 1919.
- Berlin :
-
Economics of the silk industry : a study in industrial organisation / by Ratan C. Rawlley.
- 844
- King,
- 1919.
- London :
-
Prices of rubber and rubber products / by Isador Lubin.
- Government Printing Office,
- 1919.
- Washington, DC :
-
Prices of sugar and related products / by Frank F. Anderson.
- Government Printing Office,
- 1919.
- Washington, DC :
-
Untersuchungen über den Einfluà des Waldes auf den Stand der Gewässer / von Arnold Engler.
- Von Beer,
- 1919.
- Zürich :