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Detmers, F. (3195) 



CANADA THISTLE, CIRSIUM ARVENSE TOURN. FIELD THISTLE, CREEPING THISTLE. 



Ohio Agr. Expt. Sta. Bull. 414, 45 pp., illus. 1927. 

 Dewey, L. H. (3196) 



THE RUSSIAN THISTLE AND OTHER TROUBLESOME WEEDS IN THE WHEAT REGION 



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THE RUSSIAN THISTLE: ITS HISTORY AS A WEED IN THE UNITED STATES, WITH AN 

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Div. Bot. Bull. 15, 32 pp., illus. 1894. 



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Russian thistle. U. S. Dept. Agr., Div. Bot. Circ. 3, 8 pp., illus. 1895. 



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weeds; and how to kill them. U. S. Dept. Agr. Farmers' Bull. 28, 30 pp., 



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Dietz, S. M., and Leach, L. D. (3200) 



METHODS OF ERADICATING BUCKTHORN (RHAMNUS) SUSCEPTIBLE TO CROWN 



rust (puccinia coronata) of oats. U. S. Dept. Agr. Circ. 133, 16 pp., 

 illus. 1930. 



Dunham, R. S. (3201) 



perennial sow thistle. Minn. Agr. Col. Ext. Circ. 26, 4 pp. 1928. 



Durrell, L. W., and Lungren, E. A. (3202) 



BARBERRY ERADICATION AND SOURCES OF BLACK STEM RUST IN COLORADO. 



Colo. Agr. Expt. Sta. Bull. 315, 18 pp., illus. 1927. 

 and Lute, A. M. (3203) 



THE PUNCTURE VINE: A SERIOUS WEED IN COLORADO. Colo. Agr. Col. Ext. 



Circ. 46, 4 pp., illus. 1926. 

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IRRIGATION WATER AS A FACTOR IN THE DISSEMINATION OF WEED SEEDS. 



Colo. Agr. Expt. Sta. Bull. 253, 25 pp., illus. 1920. 

 Gilkey, H. M. (3205) 



THE MOST IMPORTANT NOXIOUS WEEDS OF OREGON. Oreg. Agr. Col. Ext. 



Bull. 412, 56 pp., illus. 1929. 



Goodwin, P. M. (3206) 



weed control by means of soil sterilization. Calif. Dept. Agr. Monthly 

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Goss, W. L. (3207) 



buried seed experiment. Calif. Dept. Agr. Monthly Bull. 22: 302-304. 

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Gray G. P. (3208) 



SPRAYING FOR THE CONTROL OF WILD MORNING-GLORY WITHIN THE FOG BELT. 



Calif. Agr. Expt. Sta. Circ. 168, 7 pp. 1917. 



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TESTS OF CHEMICAL MEANS FOR THE CONTROL OF WEEDS. REPORT OF PROG- 

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BATTLE WITH WEEDS . . . DIFFERENT WEEDS REQUIRE DIFFERENT TREAT- 

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Hansen, A. A. (3211) 



Canada thistle and methods of eradication. U. S. Dept. Agr. Farmers' 

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eradication of Bermuda grass. U. S. Dept. Agr. Farmers' Bull. 945, 



11 pp., illus. 1918. 



(3213) 



cocklebur. U. S. Dept. Agr. Circ. 109, 6 pp., illus. 1920. 



