NATURAL-CONTROL FACTORS AFFECTING THE SPRUCE BUDWORM

[1] BEDARD W. D., 1938, CANADIAN ENT, V70, P188

[2] Brooks A. R., 1945, CANADIAN ENT, V77, P78

[3] BROWN AWA, 1941, CANADA DEP AGR PUB, V712, P14

[4] Brown N. R., 1946, CANADIAN ENT, V78, P121

[5] Brown N. R., 1946, CANADIAN ENT, V78, P138

[6] DAVIAULT L, 1946, 8TH DEP LANDS FOR PR

[7] GRAHAM SA, 1940, MINN U AGR EXPT STA, V142

[8] JOHANNSEN OA, 1913, MAINE AGR EXPT STA B, V210, P1

[9] KEEN FP, 1939, USDA MISC PUB, V273

[10] Mathers W. G., 1932, FOREST CHRON, V8, P154

[1] BEDARD W. D., 1938, CANADIAN ENT, V70, P188

[2] Brooks A. R., 1945, CANADIAN ENT, V77, P78

[3] BROWN AWA, 1941, CANADA DEP AGR PUB, V712, P14

[4] Brown N. R., 1946, CANADIAN ENT, V78, P121

[5] Brown N. R., 1946, CANADIAN ENT, V78, P138

[6] DAVIAULT L, 1946, 8TH DEP LANDS FOR PR

[7] GRAHAM SA, 1940, MINN U AGR EXPT STA, V142

[8] JOHANNSEN OA, 1913, MAINE AGR EXPT STA B, V210, P1

[9] KEEN FP, 1939, USDA MISC PUB, V273

[10] Mathers W. G., 1932, FOREST CHRON, V8, P154