au.\*:("EGOROVA OP")
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GEOLOGIE DU GISEMENT DES PHOSPHATES DU KHUBSUGUL.GIMMEL'FARB BM; EGOROVA OP.1969; LITOL. POLEZN. ISKOPAEM.; SUN; 1969(4), NUM. 0002, P. 3 A 9Miscellaneous