Mason, A.H. 1977 A review of maple bark scale, Cryptococcus williamsi Krb. and Hale (Homoptera: Cryptococcidae) in New Hampshire.. Journal of the New York Entomological Society 85: 190-191.

Notes: [Paper presented at 47th Annual Meeting of Eastern Branch, Entomol. Soc. Amer., Boston]; hosts and distributions; natural enemies.