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_a621.3 _bLAN _cL-12, P-42 |
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| 100 |
_aH,R. Langman _941242 |
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| 245 |
_aHow to make working diagram models _cLangman, H.R |
||
| 260 |
_aLondon _bThe technical press ltd. _c1939 |
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| 300 |
_aviii, 73 p. _bill. |
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_2ddc _cBK |
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