000 00263nam a2200109Ia 4500
008 140407s9999 xx 000 0 und d
020 _a978-043516975-6
082 0 4 _a510.7 H468a2
100 1 _aHeinemann
245 1 0 _aAddition and subtraction to 20 (2)
942 _cBK
999 _c4452
_d4452