On the exotoxin of Bacillus thuringiensis var. thuringiensis Berliner. (1) Separation and the effect of toxin on silk worms Tanaka, K.; Sadakane, H.; Murakami, H.; Hatano, S.; Watanabe, T. Science Bulletin of the Faculty of Agriculture, Kyushu University 26(1/4): 537-544 1972 https://eurekamag.com/research/000/151/000151912.php