cam a22 4500 528780123 CHVBK 20201025131016.0 180921s1975 xxu|||||||||| 00 |eng d (RERO)R008842282 RERO geusst s1st rero Mineral facts and problems by the Staff, Bureau of Mines Washington D.C. United States Department of the Interior 1975 1259 p. ill. 27 cm txt rdacontent n rdamedia nc rdacarrier Bureau of Mines bulletin 667 Ressources minérales (RERO)A021093406 rero Industrie (RERO)A021017052 rero Mines (sites d'extraction) (RERO)A021004169 rero Études diverses (RERO)A022249905 rero United States Bureau of Mines (IDREF)026633310 Bulletin / United States Department of the Interior, Bureau of Mines 667 (RERO)000912128 BK020000 XK020000 XK020000 RERO RE61096 RE61096 RE610960003 DBUJ 79 RERO 490 1- Bureau of Mines bulletin 667 RERO 710 2- United States Bureau of Mines (IDREF)026633310 RERO 830 -- Bulletin / United States Department of the Interior, Bureau of Mines 667 (RERO)000912128 SWISSBIB 313704570