Natural History in the National Park System and on the National Registry of Natural Landmarks
1980. Natural History in the National Park System and on the National Registry of Natural Landmarks. NPS/NR/NRTR-90/03. National Park Service. Washington, D.C.
This document has been prepared to identify what natural history themes are represented in units of the National Park system and in areas that have been designated National Natural Landmarks....It provides a thematic framework for evaluating nominations for new parks and plans for managing parks already in the system...