Explains how the dispersal of any species of plant or animal is limited by its rate of increase, its ability to disperse, and its ability to surmount physical and biological barriers.
Encyclopedia Britannica, 331 N. LaSalle St., Chicago, IL 60610, Phone: (312)347-7159, Toll-free: 800-323-1229, Fax: (312)294-2104, URL: http://www.britannica.com
Available on VHS
Running time 16 minutes.
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