Brown, A.W. 1942 Annual report of the forest insect survey.. Annual Report of the Forest Insect Survey: Forest Insect Survey Investigations, Dept. of Agriculture Canada 23 pp.

Notes: Scales mentioned include Phenacaspis pinifoliae, Toumeyella numismaticum, Cryptococcus fagi, Physokermes piceae, Eulecanium coryli, Gossyparia spuria, Diaspis carueli and Lecanium fletcheri.