Cressman, A.W., & Kessels, L.T. 1933 Winter mortality of the camphor scale and dictyosperma scale in 1933 at New Orleans, La.. Journal of Economic Entomology 26: 1177-1179.
Cressman, A.W., & Kessels, L.T. 1933 Winter mortality of the camphor scale and dictyosperma scale in 1933 at New Orleans, La.. Journal of Economic Entomology 26: 1177-1179.