au.\*:("BOTEV SV")
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ZEOLITE MINERALIZATIONS IN THE EASTERN SREDNOGORIYE.KOSTOV I; MAVRUDCHIEV B; BOTEV SV et al.1968; IZVEST. GEOL. INST., GEOKHIM. MINERAL. PETROGR., SOFIJA; BGR; 1968, VOL. 17, P. 83 A 110Miscellaneous
