Woodhams, G.E. 1937 Insect pests of ornamental trees.. Western Shade Tree Conference 4: 24-26.

Notes: Brief discussions of soft brown scale, black scale, hemispherical scale, tessellated scale, Monterey pine scale, European elm scale, pine leaf scale, ivy or oleander scale, greedy scale, San Jose scale, cottony cushion or fluted scale, araucaria scale, golden mealybugs, citri mealybugs, citrophilus mealybugs and Baker mealybugs.