I bought this publication when I began graduate school. It was a great resource that I used often both in graduate school and working as a wildlife ecologist in the decades afterwards. Much great information, ideas, insights and theories. It is produced by The Pymatuning Symposia in Ecology, Volume 5 of their Special Publication Series. It is Titled: "Populations of Small Mammals Under Natural Conditions", edited by Dana Snyder. Printed at the University of Pittsburg.