Use of numbers, prepared for aircraft flight and ground crews
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| Format: | Book |
| Language: | English |
| Published: |
Washington, D.C.,
c1942
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| Item Description: | Reproduced from type-written copy "Preparation: Howard K. Morgan; illustration: William Damon." |
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| Physical Description: | 1 p. ., 81 p illus., diagrs. 28 x 22 cm. |