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_aMethods and devices for acoustic estimation of density of fish schools near the bottom _fBy V. A. Ermolchev |
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_a[Μ.] _d1987 |
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_a10 л. _cил. _d29 см |
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_aInternational symposium on fisheries acoustic, Seattle, Washington, USA, June 22-26, 1987 _iPoster _vN 37 |
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| 320 | _aБиблиогр.: л. 10 | ||
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_aГидроакустика _xПрименение в рыболовстве _2nlr_sh1 |
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_9z01790 _aErmolčev _bV. A. _gVjačeslav Aleksandrovič _4070 |
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_aInternational symposium on fisheries acoustics _eSeattle, Wash. _f1987 _4570 |
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_9z01700 _aErmolchev _bV. A. _4070 |
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