¹Reference to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.

---

To return to Bulletin 2171, close this window. This site is https://pubs.usgs.gov/bulletin/b2171/footnote1.html Maintained by the Eastern Publications Group Web Team Last revised 10-07-99