In Russian. Pankratova, Valentina Grigoryevna. Problems of divisibility theory in rings and fields of algebraic numbers. Kalinin: KSU, 1979 Voprosy teorii delimosti v koltsakh i polyakh algebraicheskikh chisel/Questions of divisibility theory in rings and fields of algebraic numbers In Russian. All images are for identification of editions only. Several books of the same edition may be available. Please feel free to request photos of available books. SKU7655622