(NtIRISTORNYE PREOBRAZOWATELI W PRIWODE GORNYH MA[IN (B/s - (NkRUGLIKOW(B, (NaLEKSEJ pROHOROWI^s; (NmUZGIN(B, (NsERGEJ sPIRIDONOWI^s ((NaLMA(B-(NaTA (B:s (NnAUKA(B,s, 1978)
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Keywords: (NgORNYE MA[INYs