000 00270nam a2200109Ia 4500
008 160710s1955 xx 000 0 und d
082 _a510 PKR
245 _aPRACTICAL PROBLEMS IN MATHEMATICS
260 _bDELMAR PUBLISHERS,INC.
_c1955
300 _a141
942 _2ddc
_cB
999 _c51887
_d51887