TY - JOUR T1 - Observations on the Class of Animals Called, by Linnaeus, Amphibia; Particularly on the Means of Distinguishing Those Serpents Which are Venomous, from Those Which are not So. By Edward Whitaker Gray, M. D. F. R. S. JF - Philosophical Transactions of the Royal Society of London (1776-1886) VL - 79 SP - 21 EP - 36 PY - 1789/01/01/ UR - http://dx.doi.org/10.1098/rstl.1789.0004 M3 - doi:10.1098/rstl.1789.0004 AU - Gray, E. ER -