Cressman, A.W., Bliss, C.I., Kessels, L.T., & Dumestre, J.O. 1935 Biology of the camphor scale and a method for predicting the time of appearance of stages in the field.. Journal of Agricultural Research 50: 267-283.
Cressman, A.W., Bliss, C.I., Kessels, L.T., & Dumestre, J.O. 1935 Biology of the camphor scale and a method for predicting the time of appearance of stages in the field.. Journal of Agricultural Research 50: 267-283.