by Washington Academy of Sciences (Washington, D.C.)

1927

by Washington (State). Forest Commissioners, Board of

1906

by Washington (State). Department of Conservation

1928

by Washington State University. Extension Service

1930

by Washington State University

1922

by Washington (State)

1913

by Washington Government Printing Office

1894

by Washington Forest Fire Association

1913

by Washington (State). Legislature. House of Representatives

1923

by George Alfred Olson, Harry Baker Humphrey, J. W. Kalkus, Rolla Kent Beattie, Roscoe Wilfred Thatcher, Sofus Bertelsen Nelson, State College of Washington. Agricultural Experiment Station, State College of Washington. Dept. of Dry Land Demonstration and Experiment, Washington Bureau of Farm Development

1913

by C. C. Thom, Edwin George Schafer, Fred DeForest Heald, Homer Thomas Darlington, M. A. Yothers, Max Adams McCall, State College of Washington. Agricultural Experiment Station, State College of Washington. Dept. of Dry Land Demonstration and Experiment, Washington Bureau of Farm Development, Edward Franklin Gaines, Henry F. Holtz, Horace Mann Woolman

1915

by Washington (State).

1901