Radiol︠i︡arii nizhnego-srednego paleozo︠i︡a Kazakhstana : metody issledovaniĭ, sistematika, stratigraficheskoe znachenie - Nazarov, Boris Borisovich (Trudy (Geologicheskiĭ institut (Akademi︠i︡a nauk SSSR)) ;, 1975)