00394nam a2200133 a 450000500170000000800410001702000150005805000250007310000170009824500580011526000540017330000210022765000120024820140311163039.0111027s19uu    xx            00    eng d  a981247840x  aQH 308.2b.T236 2007  aTay, Beverly  aScience in focus :bbiology 'O' level /cBeverly Tay.  aSingapore :bPearson Education South Asia,c2007.  a354 p. :c28 cm.  aBiology