Unchalee Chawala. (1990) Gene transfer system in bacillus thuringiensis subsp. israelensis by conjugation-like process. Mahidol University,:ม.ป.ท.Unchalee Chawala. 1990. Gene transfer system in bacillus thuringiensis subsp. israelensis by conjugation-like process. ม.ป.ท.:Mahidol University,;Unchalee Chawala. Gene transfer system in bacillus thuringiensis subsp. israelensis by conjugation-like process. ม.ป.ท.:Mahidol University, 1990. Print.