Rules of the order of classes and production of various operations in the Board

Rostov-on-Don Mountains.credit o-in.Rules of the order of classes and production of various operations in the Board / Rostov of the N / D of Mountains.credit.o-in.- [Rostov-on-Don: electric.A.I.Ter-Abramian], 1912. -52, [4] with .. -.Electronic Source: PB