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MLA

Brown, R.C, H.J. Mac Aloney, and P.B Dowden. "The Spruce Budworm." , 423-427.. Print

APA

Brown, R., Aloney, H. Mac, & Dowden, P. (0000). The Spruce Budworm.

Chicago

Brown, R.C., H.J. Mac Aloney, and P.B Dowden. "The Spruce Budworm" (1949): 423-427..