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200 1 $aResearch on technology and teaching and learning of mathematics$fedited by M. Kathleen Heid and Glendon W. Blume
210   $aCharlotte$cNational council of teachers of mathematics$dcopyr. 2008-
215   $av.$cill.$d24 cm
463 \1$1001990003154650203316$12001 $a<<Vol. 1:>> Research syntheses
463 \1$1001990003180990203316$12001 $a<<Vol. 2:>>Cases and perspective
606 0 $aMatematica$xApprendimento
676   $a510.71
702  1$aHEID,$bM. Kathleen
702  1$aBLUME,$bGlendon W.
801  0$aIT$bsalbc$gISBD
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101 0 $aeng
135   $aurbn|||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
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200 10$aGold geochemical anomaly in the Cortez district, Nevada /$fby R.L. Erickson [and four others]
210  1$aWashington :$cUnited States Department of the Interior, Geological Survey,$d1966.
210  3$aWashington :$cUnited States Department of the Interior, Geological Survey,$d1968.
215   $a1 online resource (ii, 7 pages) $cmaps
225 1 $aGeological Survey circular ;$v534
320   $aIncludes bibliographical references (page 2).
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606   $aGold$zNevada$zLander County
606   $aGeochemical prospecting$2fast
606   $aGold$2fast
615  0$aGeochemical prospecting
615  0$aGold
615  7$aGeochemical prospecting.
615  7$aGold.
700   $aErickson$b Ralph Leroy$f1923-$01397494
712 02$aGeological Survey (U.S.),
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801  1$bCOP
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997   $aUNINA