00556nam a22001577i 4500001001000000005001700010008004100027082001800068100002400086245006200110260004800172300001700220650001600237999001700253952012800270SXC01326820260819093538.0260101s1970    ii            000 0 eng d  a510 ARM-S222  aEasterbrook, et al.10aSchool mathematics project: Book Y /cEasterbrook, et al.  abCambridge Univeristy Press, London,c1970  ap. ;c22 cm. 0aMathematics  c10869d10869  00102ddc4070alibraryblibrarycMATHEMATICSd2026-08-19i13268l0o510 ARM-Sp13268r2026-08-19 09:35:38w2026-08-19yBK