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Bentillo, Eulalia ; Buca,Gebard U. ; Domingo, Annette P. ; Flores, Alvin C. ; Gueco, Christian Wendell ; Jaoquin, Nympha B. ; Lamigo, Genesis Jeff ; Malicdem, Cerilina T. ; Rodrigued,Socorro M. ; Ronda, May R. ; Talisayon, Vivien M | Philippines : Institutes for science and Mathematics Education Development | 2000
