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Petrovskij, Ivan Georgievič (1901-1973). | Lekcii po teorii obyknovennyh differencial'nyh uravnenij English | (Silverman : 1966)
VIAF ID: 308379430 ( Unknown Name Type )
Permalink: http://viaf.org/viaf/308379430
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- 500 1 _ ‡a Silverman, Richard A.