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61. Controlling the boll weevil in cotton seed and at ginneries (id:ORC00000059)

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62. Foot-and-mouth disease (id:IND43637899)

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63. The prairie dog of the Great Plains (id:IND43621065)

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64. The black rot of the cabbage (id:ORC00000025)

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65. The principal insects affecting the tobacco plant (id:IND43620309)

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66. Insect control in California (id:IND23339524)

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67. The country slaughterhouse as a factor in the spread of disease (id:IND23337920)

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68. The control of root-knot (id:ORC00000005)