Wong, C K Primary Level English1/ C K Wong and Dr. Paul Lam. - New edition - Singapore : Singapore Asian Publication 2007 - 144p. :ill. 23cm. ISBN: 9872553274 LC Class. No.: PE1128 .W87283 2007 Dewey Class. No.: PE1128 .W87283 2007 National Library of Medicine Call No.: PE1128 .W87283 2007