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The tadpole of Tomopterna luganga Channing, Moyer & Dawood, 2004 (Anura : Ranidae). Salamandra. 42, 1-12.(2006).
Reproductive modes and their unexpected diversity in the Atlantic forest of Brazil. Bioscience. 55(3), 207-217.(2005).
Notes on Reptilia in the collection of the Museum of the Academy of Natural Sciences. Proceedings of the Academy of Natural Sciences of Philadelphia. 8, 146-153.(1856).
Descriptions of new species of African reptiles.. Proceedings of the Academy of Natural Sciences of Philadelphia. 2, 58-62.(1844).
Notice on a collection of reptiles from the Gaboon country, West Africa, recently presented to the Academy of Natural Sciences of Philadelphia, by Dr. Henry A. Ford. Proceedings of the Academy of Natural Sciences of Philadelphia. 9, 48-72.(1858).
Descriptions of new species of African reptiles. Proceedings of the Academy of Natural Sciences of Philadelphia. 2, 247-250.(1845).
Remarks on the geographic distribution of reptiles, with descriptions of several species supposed to be new, and corrections of former papers.. Proceedings of the Academy of Natural Sciences of Philadelphia . 7, 98-105.(1854).
Mechanistic basis of life-history evolution in anuran amphibians: Direct development. American Zoologist. 37, 160-171.(1997).
Morphological Novelty in the Limb Skeleton Accompanies Miniaturization in Salamanders. Science (Washington D C). 229, 871-874.(1985).
Jaw muscle development as evidence from embryonic repatterning in direct-developing frogs. Proceedings of the Royal Society of London - Series B: Biological Sciences. 264, 1349-1354.(1997).
Life history and morphological evolution. Journal of Evolutionary Biology. 5, 549-557.(1992).
Adaptation of bone growth to miniaturization of body size. ( , Ed.).Bone Growth. 7,(1993).
Field Guide to Amphibians of the Eastern Arc Mountains and Coastal Forests of Tanzania and Kenya. 320. Nairobi, Kenya: Camerapix Publishers International.(2010).
Conservation Assessment and Management Plan for Southern African Frogs: Final Report.. Apple Valley, MN: IUCN/SSC Conservation Breeding Specialist Group.(2001).
A report on the culture of the South African clawed frog Xenopus laevis (Daudin) at the Jonkershoek Inland Fish Hatchery. . Transactions of the Royal Society, South Africa. 45-54.(1949).
African biodiversity hotspots: The reptiles of Mt Nlonako, Cameroon. Revue suisse de Zoologie. evue suisse de Zoologie. 112, 1045-1069.(2005).
A new frog species of the genus Cardioglossa from the Tchabal Mbabo Mtns, Cameroon (Anura: Arthroleptidae).. Herpetozoa.. 17, 119-125.(2004).
Phylogenetic signal and the utility of 12S and 16S mtDNA in frog phylogeny. Journal of Zoological Systematics & Evolutionary Research. 42, 2-18.(2004).
Description of a new frog belonging to the genus Heleophryne and a note on the systematic position of the genus (Cystignathidae). Annals of the Transvaal Museum. 2, 45-46.(1910).
Some new forms of batrachians and reptiles from South Africa. Record of the Albany Museum. Grahamstown. 4, 283-357.(1935).
Descriptions of three new toads belonging to the genus Breviceps Merrem.. Annals of the Natal Museum. 5, 189-194.(1925).
Some genetic consequences of ice ages, and their role in divergence and speciation. Biological Journal of the Linnean Society. 58, 247-276.(1996).