GENETIC SIGNIFICANCE OF THE RARE-EARTH ELEMENTS IN THE YOUNGER GRANITES OF NORTHERN NIGERIA AND THE CAMEROONS.ALEKSIEV EI.1970; GEOCHEM. INTERNATION.; USA; 1970, VOL. 7, NUM. 0001, P. 127 A 132Miscellaneous

RARE-EARTH ELEMENTS IN YOUNGER GRANITES OF NORTH NIGERIA AND THE CAMEROONS AND THEIR GENETIC IMPORTANCE.ALEKSIEV EI.1970; GEOKHIMIJA; SUN; 1970(2), NUM. 0002, P. 192 A 198Miscellaneous

SEPARATION OF RARE-EARTH ELEMENTS IN THE MAGMATIC PROCESS.ALEKSIEV EI.1969; PROBLEMS.OF.GEOCHEMISTRY-EDITOR.KHITAROV.N.I.; 1969, P. 396 A 405Miscellaneous