The first edition of Ecology has the letters ABCD on page 160. Copyright © 1973 by Western Publishing Company, Inc. Published by Golden Press, New York, N.Y. Cover price is $1.95. The number on the spine is 24359. Listed as a Golden Guide on the cover and a Golden Science Guide on the inside front cover.
A French version exists titled Ecologie. © 1973 by Western Publishing Company, Inc. Publié par les Editions des Deux Coqs d'Or, Paris, 1974.
A German version exists titled Leben und Umwelt. Number 30 in the series. © 1973, 1977 by Western Publishing Company, Inc. Erschieven im Delphin Verlag, Stuggart und Zürich, 1977. Printed in Italy by New Interlitho, Trezzano. ISBN 3-7735-2730-6
This title also exists in a large (5 ¼ by 7 ¾ inch) hardcover. The number on the back cover is 0-307-64359-X.
No cover variant or revised edition exists. Out of print.