000 00316nam a2200121 a 4500
005 20140414132113.0
008 110817s19uu xx 00 eng d
050 _aREF 503
_bA5 1990
245 _aAnimals without backbones.
260 _aSingapore :
_bWorl book,
_c1990.
440 _aYoung Scientist
541 _eM6740
999 _c114833
_d114833