Professional Paper 1650-E
The methods and climatic data used in this atlas are described in the Introduction to the first volume of this series (U.S. Geological Survey Professional Paper 1650-A). If you have an internet connection you can access this volume at https://pubs.usgs.gov/pp/p1650-a/. |
Index Maps of Ecoregions
Graphical Displays The figures included in the Graphical Displays and Histograms sections of this volume are in Adobe Acrobat format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge. |