1995 - Critical Masses the Global Population Challenge (Paperback) → Hardcover ISBN-13: 9780140232264 ISBN-10: 0140232265 Genres: Nonfiction, Science & Math 1 1994 - Critical Masses the Global Population Challenge (Hardcover) → Paperback ISBN-13: 9780670852352 ISBN-10: 067085235X Genres: Nonfiction, Science & Math ? Global Population Growth 21st Century Challenges [Headline Series] (Paperback) ISBN-13: 9780871241580 ISBN-10: 0871241587 Genres: History, Nonfiction ? |