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[Jbrary of Com^rss Crwoglog i. Prblkotloa Data: <br />Magas, Jeff A. <br />Surface substdtrttt wer a room -and -pillar want m the weAstrn Urattd Statts ( by <br />ktf & Matem <br />p, cm. — (Information circular, 9117) <br />Includes bibliographical ttftrencts (p. 15). <br />I Mitre S"dtnce—Colorado—Pafmde Retwn. 1 Goal mmea snd rnteint— <br />Worado—Palwde Region. 1. Title 11 Serim information circular (Ututed <br />Setts, Bureau of mm"); 9347 <br />TN295.U4 (TN319) 622 s--dc2O (622'.2RI 93.2741 CIP <br />