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| 245 | _aDissertation abstracts international. B, The sciences and engineering | ||
| 260 |
_aAnn Arbor, Mich. : _b University Microfilms |
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| 300 | _aVarious pagings | ||
| 650 |
_aScience _vAbstracts _xPeriodicals |
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_aDissertations, Academic _vUnited States _xAbstracts _xPeriodicals |
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