The area covered by this guide is so large that I could not possibly have written it up without the help of many people.

I particularly wish to thank Bob Randall and Frank Kelley, who provided much of the information used for the Bismarck-Mandan and Grand Forks areas, respectively; my brother and almost constant field companion Barry Zimmer, who helped with many suggestions; Kelly Stonecypher, who provided inspiration and the best kind of moral support; and most importantly, Jim Lane, whose advice, help, and encouragement made this book possible.

Many others helped in some way, either with advice and information, or as field companions. I want to thank the following, and after this has gone to press I will probably think of others: Milan Alby, Steve Allen, Beth Anderson, David L. Bartling, William Buresh, Gary A. Eslinger, Palmer Forness, Ralph Fries, Ann and Bob Gammell, David Goeke, Harold Holt, Harold Kantrud, Art Lies, Donald E. Lindberg, Jon M. Malcolm, Rebecca Quanrud, Robert Rollings, Alan K. Trout, Robert Walkin, Dr. Nathaniel Whitney, Hugh Willoughby, Jim Zimmer, and Bernard and Mary Zimmer.

I would appreciate any suggestions or information for future editions of this book. All such correspondence should be addressed to: Kevin J. Zimmer, L & P Press, Box 21604, Denver, Colorado 80221.