- Tufts, Wm. O.2
- Twiss, W. Patrick2
- United States. Army. Engineer Regiment, 29th2
- United States. Department of Agriculture. Division of Publications2
- United States. Forest Service. California Region2
- United States. Forest Service. Intermountain Region2
- United States. War Department. General Staff. War College Division2
- United States. Weather Bureau2
- Upham, Warren, 1850-19342
- Valck, G. (Gerard), 1651 or 1652-1726.2
- Vermont. Department of Highways2
- W.A. Fisher Company2
- W.W. Hixson & Co.2
- Warner & Foote2
- Warner, George E., 1826?-19172
- Weiblen, Paul W.2
- Wellge, H. (Henry)2
- Wells, Edward, 1667-17272
- West Virginia. State Road Commission2
- Wheeler, A. O. (Arthur Oliver), 1860-19452