by Evans, Millie.

[ 01. English Non Fiction ] Authors: Mullen, Eric. | Prince Edward Island.--Environmental Conservation Services. Published by : Province of Prince Edward Island, Dept. of the Environment, Environmental Conservation Services, ([Charlottetown] :) Physical details: 53 p. : ill. ; 22 cm. Subject(s): Pond ecology. Year : 1977 Item type : 01. English Non Fiction