RARE-EARTH ELEMENTS IN THE SKAERGAARD INTRUSION.HASKIN LA; HASKIN MA.1968; GEOCHIM. COSMOCHIM. ACTA; GBR; 1968(4), VOL. 32, NUM. 0004, P. 433 A 447Miscellaneous

RARE-EARTH ABUNDANCES IN SOME ULTRAMAFIC ROCKS.FREY FA; HASKIN LA; HASKIN MA et al.1971; J. GEOPHYS. RES.; USA; 1971(3), VOL. 76, NUM. 0008, P. 2057 A 2070Miscellaneous

RARE EARTH ABUNDANCES IN SOME BASIC ROCKS.FREY FA; HASKIN MA; POETZ JA et al.1968; J. GEOPHYS. RES.; USA; 1968(9), VOL. 73, NUM. 0018, P. 6085 A 6098Miscellaneous

RELATIVE AND ABSOLUTE TERRESTRIAL ABUNDANCES OF THE RARE EARTHS.HASKIN LA; HASKIN MA; FREY FA et al.1968; INTERNATION. SER. MONOGR. EARTH SCI; GBR; 1968, VOL. 30, P. 889 A 912Miscellaneous