Murray, B. G. (1967). "Grebes from the late Pliocene of North America". The Condor. 69 (3): 277–288. doi:10.2307/1366317. JSTOR1366317.
Chandler, R. M. (1990). "Part II: Fossil Birds of the San Diego Formation, Late Pliocene, Blancan, San Diego County, California". Ornithological Monographs. 44 (44): 73–161. doi:10.2307/40166674. JSTOR40166674.
jstor.org
Murray, B. G. (1967). "Grebes from the late Pliocene of North America". The Condor. 69 (3): 277–288. doi:10.2307/1366317. JSTOR1366317.
Chandler, R. M. (1990). "Part II: Fossil Birds of the San Diego Formation, Late Pliocene, Blancan, San Diego County, California". Ornithological Monographs. 44 (44): 73–161. doi:10.2307/40166674. JSTOR40166674.