000 00305nam a22001097a 4500
999 _c51669
_d51669
082 _aR 508 N213y 1964
110 _aNational College of Education
245 _aYoung people's science encyclopedia
260 _aSingapore
_bFar Eastern Pub. Ltd.
_cc1964
650 _aScience - Encyclopedia
942 _2ddc
_cBK