. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. ST^ 46. Sula sula rubripes: "brown" juvenile. 47. Sula sula rubripes: adult "brown and white" form with few white scapular Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Press; National Research Council (U. S. ). Pacific Science Board; Smithsonian Institution; National Museum of Natur
. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. ST^ 46. Sula sula rubripes: "brown" juvenile. 47. Sula sula rubripes: adult "brown and white" form with few white scapular Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Press; National Research Council (U. S. ). Pacific Science Board; Smithsonian Institution; National Museum of Natural History (U. S. ); United States. Bureau of Sport Fisheries and Wildlife. Washington, D. C. : [Smithsonian Press]
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