Chantana Sornsiri และ Puttana Roongravee; Manat Pithuncharurnlap. (1996) Testing for Heterogeneity of Experimental Error for Combined Analysis. <i>Thai Agricultural Research Journal</i>, <i>14</i>(3), 205-208.Chantana Sornsiri และ Puttana Roongravee; Manat Pithuncharurnlap. "Testing for Heterogeneity of Experimental Error for Combined Analysis". Thai Agricultural Research Journal 14 (1996):205-208.Chantana Sornsiri และ Puttana Roongravee; Manat Pithuncharurnlap. Testing for Heterogeneity of Experimental Error for Combined Analysis. Department of Agriculture:ม.ป.ท. 1996.