Harris 1928, pp. 9–10 Harris, Harry (1928). "Robert Ridgway (With A Bibliography Of His Published Writings And Fifty Illustrations)". The Condor. XXX (1): 5–118. doi:10.2307/1362947. JSTOR1362947.
jstor.org
Harris 1928, pp. 9–10 Harris, Harry (1928). "Robert Ridgway (With A Bibliography Of His Published Writings And Fifty Illustrations)". The Condor. XXX (1): 5–118. doi:10.2307/1362947. JSTOR1362947.