Boyd, W.M. 1946 Injurious insects of New Jersey nurseries.. Circular (New Jersey Department of Agriculture) No. 355: 1-142.

Notes: Scales discussed include cottony maple scale, euonymus scale, European elm scale, golden oak scale, juniper scale, oyster shell scale, pine needle scale, Putnam scale, rose scale, San Jose scale, scurfy scale, and tulip tree scale.