Scans of Aven Nelson collecting field books. This section dates from 1897 and contains records 3752-4481. (This book actually appears to contain information on records 2807-5376. Inside the front cover says this is book 5b. This book is a Systematic arrangement for 1897. Also, inside the front cover, it is stated that this book is "Re-written by Elias Nelson". The front of the book says to see a Printed Report: see Bulletin No. 13, Dept. of Agrostology.)
Manuscript originals available at the University of Wyoming.