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	1.	The fir engraver beetle : a serious enemy of white fir and red fir / by G.R. Struble. by Struble, George R, 1904- Series: Circular (United States. Department of Agriculture) ; no. 419. Material type: Text; Format: print ; Literary form: Not fiction Publication details: Washington, D.C. : U.S. Dept. of Agriculture, 1937 Availability: No items available. Add to cart (remove)
	2.	The mountain pine beetle, by George R. Struble and Philip C. Johnson. by Struble, George R, 1904- Johnson, Philip C. (Philip Cornwell), 1907-1990 Edition: Rev. Material type: Text; Format: print ; Literary form: Not fiction Publication details: [Washington, U.S. Govt. Print. Off.] 1967 Availability: No items available. Add to cart (remove)

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