O'Dell, J.H. 1931a Road inspection stations: 1929.. Annual report (Arizona Commission of Agriculture and Horticulture) 21st & 22nd: 34-36.

Notes: Red scale, purple scale, soft brown scale, greedy scale, black scale, cottony cushion scale, ivy scale, rose scale, San Jose scale, pine leaf scale, hemispherical scale, hemlock scale and mealybugs listed.