by Robert Elliott Flickinger

1904

by Robert Hendre Kelby

1905 · New York : [s.n.]

by George Francis Robert Henderson

1905 · London ; New York : Longmans, Green and Company

by Ascott Robert Hope Moncrieff

1877

by Robert Henlopen Labberton

1901

by Robert Edward Hughes

1906

by William Robert Shepherd

1911

by Ernst Hartert, Francis Charles Robert Jourdain, Norman Frederic Ticehurst, Harry Forbes Witherby

1912

by William Robert Ogilvie-Grant

1893

by Arthur Robert Laws, Philip Lance

1922

by Augustine Robert Whiteway

1902

by Robert Owen

1880