275
275
Shimkin D.B. Minerals: A Key to Soviet Power. Cambridge (Mass.): Harvard Univ. Press, 1953. (Цит. no: Jones R.H. Op. cit. P. 220–221); Harrison M. Op. cit. P. 124, 153.
275
Shimkin D.B. Minerals: A Key to Soviet Power. Cambridge (Mass.): Harvard Univ. Press, 1953. (Цит. no: Jones R.H. Op. cit. P. 220–221); Harrison M. Op. cit. P. 124, 153.