by Walter Herbert Olin

1905

by Andrew H. Danielson, Clarence Preston Gillette, George Henry Glover, Orville Blaine Whipple, Philo Kneeland Blinn, Samuel Arthur Johnson, Walter Herbert Olin, William Parker Headden, Colorado Agricultural Experiment Station

1906

by Orville Blaine Whipple, Burton Orange Longyear, Philo Kneeland Blinn, Walter Herbert Olin, Wendell Paddock, William Levi Carlyle, William Parker Headden, C. J. Griffith

1905

by Walter Herbert Olin

1913

by Burton Orange Longyear, Colorado Agricultural Experiment Station, Per Axel Rydberg, Philo Kneeland Blinn, Walter Herbert Olin, Wendell Paddock, William Levi Carlyle, William Parker Headden, Christopher James Griffith, A. J. Meyer

1905