00584cam a22002294a 4500003001000000005001700010008004100027020001500068040002500083041000800108044000800116080001200124100001600136245002900152260002900181300002700210504003100237650003000268650002000298655001900318700001700337AR-SsjUIB20250710164157.0250429s1992    xxu           000 0 eng d  a0873351053  aAR-SsjUIBcAR-SsjUIB0 aeng  axxu  a622.0371 aCope, L. W.10aPractical placer mining.  aColorado :bAime,c1992.  a106 p. :bil. ;c23 cm  aBibliografía en p.93-97. 7aDepositos aluviales2lemb 7aMinería2lemb 7aLibro2unescot1 aRice, Lee R.