Sims, Roy.
Sims, Roy.
Skinner, H. Alan.
Skinner, H. Alan.
Slate, W.L.
Slate, W.L.
Slattery, Harry.
Slattery, Harry.
Smallman, Beverly N.
Smallman, Beverly N.
Smallman, J.E.
Smallman, J.E.
Smart, J.
Smart, J.
Smedley, Samuel L.
Smedley, Samuel L.
Smillie, Keith.
Smillie, Keith.
Smith, Alpheus W.
Smith, Alpheus W.
Smith, Charles F.
Smith, Charles F.
Smith, G. Dudley.
Smith, G. Dudley.
Smith, G.F.M.
Smith, G.F.M.
Smith, Lenore.
Smith, Lenore.
Smith, Gordon.
Smith, Gordon.
Smith, W.H.B.
Smith, W.H.B.
Smith, W.R.
Smith, W.R.
Smith, Walter M.
Smith, Walter M.
Smithsonian Institution.
Smithsonian Institution.
Snodgrass, R.E.
Snodgrass, R.E.
Snyder, Leon C.
Snyder, Leon C.
Snyder, Viola.
Snyder, Viola.
Somers, George F. Jr.
Somers, George F. Jr.
Sonneborn, T.M.
Sonneborn, T.M.
Soper, Douglas.
Soper, Douglas.
Snyder, John S.
Snyder, John S.
Spieth, Herman T.
Spieth, Herman T.
Spohn, E.S.
Spohn, E.S.
Stalford, S.
Stalford, S.
Stanfield, Rodger.
Stanfield, Rodger.
Stannard, Louis J.
Stannard, Louis J.
Stapleford, E.W., Mrs.
Stapleford, E.W., Mrs.
Stead, H.G.
Stead, H.G.
Stead, Robert J.C.
Stead, Robert J.C.
Steen, John K.
Steen, John K.
Steinburgh, W.E.
Steinburgh, W.E.
Stephens, E. Sydney.
Stephens, E. Sydney.
Stephens, June M.
Stephens, June M.
Sterling, Robert D.
Sterling, Robert D.
Stevenson, Collier.
Stevenson, Collier.
Stevenson, James O.
Stevenson, James O.
Stirrett, Geo. M.
Stirrett, Geo. M.
Stokes, Allen W.
Stokes, Allen W.
Stone, Neil.
Stone, Neil.
Stothers, Don.
Stothers, Don.
Strome, I.R.
Strome, I.R.
Suomela, Arne.
Suomela, Arne.
Sutherland, W.A.
Sutherland, W.A.
Sutton, Dan
Sutton, Dan
Swartz, Melvin.
Swartz, Melvin.
Swayze, Byron A.
Swayze, Byron A.
Sweet, Jeanie C.
Sweet, Jeanie C.
Swingle, H.S.
Swingle, H.S.
Tait, W.S.
Tait, W.S.
Talmon, Dr.
Talmon, Dr.
Tanner, N.E.
Tanner, N.E.
Taylor, D.J.
Taylor, D.J.
Taylor, Walter P.
Taylor, Walter P.
Templin, Hugh.
Templin, Hugh.
Thomas, J.D.
Thomas, J.D.
Thompson, H.W.J.
Thompson, H.W.J.
Thompson, J. Gordon.
Thompson, J. Gordon.
Thompson, M.J., Mrs.
Thompson, M.J., Mrs.
Thompson, Paul E.
Thompson, Paul E.
Thompson, W.G.
Thompson, W.G.
Thorburn & Abbott.
Thorburn & Abbott.
Tick-Tock Tunes.
Tick-Tock Tunes.
Tiedje, Patricia A.
Tiedje, Patricia A.
Tobe's Treery.
Tobe's Treery.
Torrens, R.W.
Torrens, R.W.
Townshend, A.S.
Townshend, A.S.
Troyer Natural Science Service.
Troyer Natural Science Service.
Trueman, H.L.
Trueman, H.L.
Tufts, Robie.
Tufts, Robie.
Turner, John Peter.
Turner, John Peter.
Turville, Dorothy.
Turville, Dorothy.
Twinn, C.R.
Twinn, C.R.
Uhrich, M.
Uhrich, M.
U.S. Agricultural Adjustment Administration.
U.S. Agricultural Adjustment Administration.
U.S. Corps of Engineers.
U.S. Corps of Engineers.
U.S. Bureau of Fisheries.
U.S. Bureau of Fisheries.
U.S. Dept of Agriculture.
U.S. Dept of Agriculture.
U.S. Engineer Office (Ore.).
U.S. Engineer Office (Ore.).
U.S. Fish and Wildlife Service
U.S. Fish and Wildlife Service
U.S. Forest Service.
U.S. Forest Service.
U.S. Geographical Survey.
U.S. Geographical Survey.
U.S. Conservation Service.
U.S. Conservation Service.
U.S. Superintendent of Documents.
U.S. Superintendent of Documents.
University Farm, St. Paul Minn.
University Farm, St. Paul Minn.
University of Iowa.
University of Iowa.
University of Michigan.
University of Michigan.
University of Wisconsin Agricultural Experiment Station.
University of Wisconsin Agricultural Experiment Station.
Urquhart, F.A.
Urquhart, F.A.
Van Blaricom, Earl W.
Van Blaricom, Earl W.
Vance, Jas.
Vance, Jas.
Vanderland, C.A.
Vanderland, C.A.
Van Cleave, Harley J.
Van Cleave, Harley J.
Van Tassel, Alfred J.
Van Tassel, Alfred J.
W. & G. Foyle.
W. & G. Foyle.
Wade, Douglas E.
Wade, Douglas E.
