Gildart, Robert C., _Meet the Mammals of Waterton-Glacier_. Glacier Natural History Association, Inc. Thomas Printing, Inc., Kalispell, Mont. 1975. McCormick, Jack, _The Life of the Forest_. McGraw-Hill, New York. 1966. Milne, Lorus and Margery Milne, _The Balance of Nature_. Alfred A. Knopf, Inc., New York. 1960. Nelson, Alan G., _Wildflowers of Glacier National Park_. Nelson, Great Falls, Mont. 1970. Peattie, Donald Culross, _A Natural History of Western Trees_. Bonanza Books, New York. 1953. Ruhle, George C., _Roads and Trails of Waterton-Glacier Parks_. John W. Forney, Minneapolis, Minn. 1972. Shea, David S., _Animal Tracks of Glacier National Park_. Special Bulletin No. 11, Glacier Natural History Association, Inc., West Glacier, Mont., 1969. Storer, John H., _The Web of Life_. Devin-Adair Co., Old Greenwich, Conn. 1953. Zwinger, Ann H. and Beatrice E. Willard, _Land Above the Trees_. Harper and Row, New York. 1972. [Illustration: WATERTON LAKES NATIONAL PARK—GLACIER NATIONAL PARK] Using Metrics As we go to press with this book, the United States is in the early stages of conversion to the metric system of measurement, and though we urge you to think metric—for most of the world does—we provide this table to help you understand the measurements given in the book. To convert from to multiply by Millimeters Sixteenth-inches 0.6301 Centimeters Inches 0.3937 Meters Feet 3.2808 Kilometers Miles 0.6214 Hectares Acres 2.4711 Hectares Square miles 0.00386 Grams Troy Ounces 0.0322 Kilograms Pounds 2.2046 Degrees—Celsius Degrees—Fahrenheit 1.8, and add 32 [Illustration: Temperature Conversion Chart] [Illustration: Length Conversion Chart] Drawings from David S. Shea, _Animal Tracks of Glacier National Park_ [Illustration: red fox, hind foot, in mud 53 mm.] [Illustration: mule deer, adult buck, in snow 72 mm.] [Illustration: badger, left front foot, in mud 43 mm.] [Illustration: coyote, hind foot, in snow 63 mm.] About the Author Greg Beaumont’s interest in Glacier National Park dates from 1963, when he was a summer employee at Lake McDonald Lodge. In 1966 he and his wife were fire-control lookouts on Numa Ridge in the Bowman Valley. Now a free-lance writer-photographer, he lives with his family in Lincoln, Nebraska. National Park Service U.S. Department of the Interior