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Comments on snakes from central and western Mexico
Author: Dixon, James R.; Sabbath, Mike; Worthington, Richard D.
Call no: RP12146
Year: 1962
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Observations on the relative sizes of three species of salamander larvae in a Maryland pond
Author: Worthington, Richard D.
Call no: RP12147
Year: 1968
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Postmetamorphic changes in the skeletal system of Ambystoma opacum gravenhorst (Amphibia, caudata)
Author: Worthington, Richard D.
Call no: RP12148
Year: 1969
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Additional observations on sympatric species of salamander larvae in a Maryland pond
Author: Worthington, Richard D.
Call no: RP12149
Year: 1969
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Concerning the reproductive habits of tropical plethodontid salamanders
Author: McDiarmid, Roy W.; Worthington, Richard D.
Call no: RP12150
Year: 1970
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