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00769aam a22002295a 4500 001 F0BF7C3CFCE711E799AF106097128E48 003 SILO 005 20180119010249 008 150226s2014 000 0 eng d 020 $a 9780675086547 020 $a 067508654X 040 $d SILO 100 1 $a Ashlock, Robert B., $d 1930- 245 10 $a Error patterns in computation : $b a semi-programmed approach / $c Robert B. Ashlock 250 $a 2d ed. 260 $a Columbus, OH $b Merrill $c c1976. 300 $a ix, 145 p. : $b ill. ; $c 25 cm. 504 $a Bibliography: p. 122-128 650 1 $a Arithmetic $x Study and teaching (Elementary) 941 $a 1 952 $l OVUX522 $d 20220317031842.0 956 $a http://locator.silo.lib.ia.us/search.cgi?index_0=id&term_0=F0BF7C3CFCE711E799AF106097128E48Initiate Another SILO Locator Search