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Z, Ordered index cards to the glass plate and film negatives (Index Cards)
Zoological Division Survey Correspondence (Box 1, Folder 01)
Young Naturalist's Society. Secretary and Treasurer's Reports, Committees, Attendance Records (Box 10, Folder 93)
Young Naturalist's Society. Minutes. (Box 10, Folder 94)
Young Naturalist's Society. Minnesota plants (Box 10, Folder 96)
Young Naturalist's Society. Membership reports and correspondence (Box 10, Folder 95)
Young Naturalist's Society. Herrick articles (Box 10, Folder 97)
Young Naturalist's Society. Constitution and Amendments (Box 10, Folder 92)
Y, Ordered index cards to the glass plate and film negatives (Index Cards)
W, Ordered index cards to the glass plate and film negatives (Index Cards)
Wilson Ornithological Club, Illustrations Committee (Box 44, Folder 393)
Wilson Ornithological Club, Illustrations Committee (Box 44, Folder 392)
Wilson Ornithological Club (Box 44, Folder 391)
Walter Breckenridge, Miscellaneous Correspondence, Publications, Photographs (Box 75, Folder 13)
Walter Breckenridge Birds of Churchill Report (Box 76, Folder 2)
Walter Breckenridge Bird Banding Permit Correspondence (Box 76, Folder 1)
Walter Breckenridge, Back River expedition (Box 75, Folder 15)
V, Ordered index cards to the glass plate and film negatives (Index Cards)
U, Ordered index cards to the glass plate and film negatives (Index Cards)
Unpublished manuscript, "The Birds of Minnesota, Their Habits, Structure, Development and Classification," by Henry Francis Nachtrieb and Thomas Sadler Roberts (Box 3, Folder 18)