00874cam a2200217   4500020001800000082002700018100002600045245009000071250001200161260004200173300003800215500012000253500009500373526003700468526003700505650002300542650001500565700002700580700002700607700002200634  a0.02-342770-100a604.2bGIEcL-12, P-671 aSpencer, Henry Cecil,10aTechnical drawing problems, series 2c[by] Henry Cecil Spencer [and] Ivan Leroy Hill.  a9th ed.  aNew York,bMacmillan Pub. Co.cc1991.  av, 9 p., [104] l.billus.c28 cm.  a"Intended primarily for use with Technical drawing (sixth edition, 1974) by Giesecke, Mitchell, Spencer, and Hill."  aEarlier ed. by F. E. Giesecke published under title: Technical drawing problems, series l.  a0b0c0d604_200000000000000_GIE  a0b0c0d604_200000000000000_GIE 0aMechanical drawing 0aNUST / MCE1 aGiesecke, Frederick E.1 aGiesecke, Frederick E.1 aHill, Ivan Leroy,