Rabago, Lilia M. Catada, Crescencia N. Palomares, Milagros M. Mencias, Cristina F. Abracia, Norma M. text Quezon City Vibal Publishing House, Inc. c1980 monographic vii, 598 p. : figs. and tables ; 23 cm. Lilia M. Rabago [and four others]. Includes index. Science 500 I611 1980