000 00357nam a2200145Ia 4500
020 _a9780521589291
082 _b3087
_a510
100 _a"Anita Straker"
245 0 _aMental maths
260 _bCambridge : Cambridge University Press, 1994-1996.
_c1996
300 _a28
944 _cBK
999 _c140928
_d140928