TY - JOUR T1 - Extract of a Letter from J. F. Gronovius, M. D. at Leyden, November 1742 to Peter Collinson, F. R. S. concerning a Water Insect, Which, Being Cut into Several Pieces, Becomes So Many Perfect Animals JF - Philosophical Transactions (1683-1775) VL - 42 SP - 218 EP - 220 PY - 1753/01/01/ UR - http://dx.doi.org/10.1098/rstl.1742.0046 M3 - doi:10.1098/rstl.1742.0046 AU - Gronovius, J. ER -