Petersen, R. C. Connecticut's venomous snakes: Timber, rattlesnake and Northern copperhead.
Chicagoスタイル(17版)引用形式Petersen, Richard C. Connecticut's Venomous Snakes: Timber, Rattlesnake and Northern Copperhead. Middletown.
MLA(9版)引用形式Petersen, Richard C. Connecticut's Venomous Snakes: Timber, Rattlesnake and Northern Copperhead.
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