by Harry Levi Hollingworth

1926

by Harry Levi Hollingworth

1920

by Harry Levi Hollingworth

1928

by Harry Tipper, Harry Levi Hollingworth, George Burton Hotchkiss, Frank Alvah Parsons

1923

by Harry Levi Hollingworth

1909

by Harry Levi Hollingworth

1927

by Harry Tipper, Harry Levi Hollingworth, Frank Alvah Parsons

1915

by Columbia University, Harry Levi Hollingworth

1911

by Harry Levi Hollingworth

1922

by Harry Levi Hollingworth, Albert Theodor Poffenberger

1919

by Harry Levi Hollingworth

1930

by Harry Levi Hollingworth

1914