kw.\*:("GERSDORFFITE-ULLMANITE")
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RELATIONS BETWEEN REFLECTIVITY, MICROHARDNESS AND ELEMENTCONTENTS REGARDING GERSDORFFITE AND ULLMANNITE (ABSTRACT).GIES H.1969; MED. DAN. GEOL. FOEREN; DNK; 1969, VOL. 19, NUM. 0003Miscellaneous
