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Contribution to the Technique of Landing Large Airships: Part 1
Many treatises in regard to construction of airship sheds are lacking in data on air currents, for which reason this phase of the problem will be here thoroughly discussed in connection with the accompanying photographs of currents.
Date:
May 1929
Creator:
Krell, O.
System:
The UNT Digital Library
Summarized Data of Lead Production Showing the Relation of Production in the United States to That of the World
Report presenting information on the production of lead since 1800.
Date:
1929
Creator:
Smith, Lewis Anderson
System:
The UNT Digital Library