Britton, W.E., & Zappe, M.P. 1927a Some insect pests of nursery stock in Connecticut.. Bulletin of the Connecticut Agricultural Experiment Station No. 292: 1-173.

Notes: Reviews scale species including European fruit lecanium, oyster-shell scale, San Jose scale, scurfy scale, oak gall scale, tulip tree scale, terrapin scale, European elm scale, cottony maple scale, elm scurfy scale, euonymus scale, rose scale, white peach scale, pine leaf scale, and juniper scale.