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| 1 | Title: | Military observation balloons (captive and free): a complete treatise on their manufacture, equipment, inspection, and handling, with special instructions for the training of a field balloon company | |
| Creator: | Widmer, Emil Joseph, 1889- | ||
| Publication: | D. Van Nostrand Co, New York,1917. | ||
| Call #: | U640 .W641 1917 | ||
| Extent: | vii, 151 pages : including frontispiece, illustrations, folded plates ; 20 cm | ||
| Subjects: | Balloons | Aerial observation (Military science) | ||
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