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Irrigation in the state of WashingtonGovernment Document Bookद्वारा Waller, O. L. (Osmar Lysander), 1857-1935
प्रकाशित 1909 -
Irrigation in the Yakima Valley WashingtonGovernment Document Bookद्वारा Jayne, S. O. (Stephen Oscar), 1878-
प्रकाशित 1907