Maple (Acer) and other trees disorder :
cottony maple scale /
Daniel L. Mahr and Phil Pellitteri.

APA Citation

Mahr, D. L., Pellitteri, P. J., University of Wisconsin--Extension. Cooperative Extension Programs. (1981). Maple (Acer) and other trees disorder: cottony maple scale. [Madison, Wis.]: University of Wisconsin--Extension.

MLA Citation

Mahr, Daniel L, Phillip J Pellitteri, and University of Wisconsin--Extension. Cooperative Extension Programs. Maple (Acer) And Other Trees Disorder: Cottony Maple Scale. [Madison, Wis.]: University of Wisconsin--Extension, 1981.