Softcover has light shelfwear and rubbing. Covers protected by clear laminate. Pages are tight and clean. No DJ. Library discard with usual marks and attachments. Pocket removed. 351 pages. SoftCover Binding. Year: 1970. ISBN: 0. An anthology of papers presented at the 13th National Conference of the US National Commission for UNESCO, November 1969, San Francisco, California. A primer for environmental awareness, meant for all concerned citizens, whether students or non students. It is ideally suited for a text in interdisciplinary courses treating the wide spectrum of man and his environment, and for supplementary use in introductory non major biology courses.