Comprehensive plan for the Illinois Nature Preserves System 1
Cover title Prepared by Illinois Nature Preserves Commission under the guidance of the Framework Advisory Committee and in cooperation with the Illinois Dept. of Conservation Archaeological preservation site to be established pending completion of studies by Ill. Dept. of Conservation and Ill. Archaeology Survey.--Foreword 1 folded col. map in pocket, pt. 2 Bibliography: p. 30, pt. 2 pt. 1. Guidelines -- pt. 2. The Natural divisions of Illinois
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