|
USA | |
| Plemons, Douglas (2006) The United States Saltpeter Cave Survey, 2006 : Journal of Spelean History, Vol.40,No.2, Issue 132 (July-December ,2007 |
| Plemons, Douglas (2006) The United States Saltpeter Cave Survey, 2006 : Journal of Spelean History, Vol.40,No.2, Issue 132 (July-December ,2007 |
| Plemons, Douglas (2006) The United States Saltpeter Cave Survey, 2006 : Journal of Spelean History, Vol.40,No.2, Issue 132 (July-December ,2007 |
| Plemons, Douglas (2006) The United States Saltpeter Cave Survey, 2006 : Journal of Spelean History, Vol.40,No.2, Issue 132 (July-December ,2007 |
| Plemons, Douglas (2006) The United States Saltpeter Cave Survey, 2006 : Journal of Spelean History, Vol.40,No.2, Issue 132 (July-December ,2007 |
| Plemons, Douglas (2006) The United States Saltpeter Cave Survey, 2006 : Journal of Spelean History, Vol.40,No.2, Issue 132 (July-December ,2007 |
| Plemons, Douglas (2006) The United States Saltpeter Cave Survey, 2006 : Journal of Spelean History, Vol.40,No.2, Issue 132 (July-December ,2007 |
| Plemons, Douglas (2006) The United States Saltpeter Cave Survey, 2006 : Journal of Spelean History, Vol.40,No.2, Issue 132 (July-December ,2007 |
| Plemons, Douglas (2006) The United States Saltpeter Cave Survey, 2006 : Journal of Spelean History, Vol.40,No.2, Issue 132 (July-December ,2007 |
| Plemons, Douglas (2006) The United States Saltpeter Cave Survey, 2006 : Journal of Spelean History, Vol.40,No.2, Issue 132 (July-December ,2007 |
| Plemons, Douglas (2006) The United States Saltpeter Cave Survey, 2006 : Journal of Spelean History, Vol.40,No.2, Issue 132 (July-December ,2007 |
| The Encyclopedia of Arkansas History & Culture (http://encyclopediaofarkansas.net) |
| Plemons, Douglas (2006) The United States Saltpeter Cave Survey, 2006 : Journal of Spelean History, Vol.40,No.2, Issue 132 (July-December ,2007 |
| Plemons, Douglas (2006) The United States Saltpeter Cave Survey, 2006 : Journal of Spelean History, Vol.40,No.2, Issue 132 (July-December ,2007 |
| Plemons, Douglas (2006) The United States Saltpeter Cave Survey, 2006 : Journal of Spelean History, Vol.40,No.2, Issue 132 (July-December ,2007 |
| Plemons, Douglas (2006) The United States Saltpeter Cave Survey, 2006 : Journal of Spelean History, Vol.40,No.2, Issue 132 (July-December ,2007 |
| Plemons, Douglas (2006) The United States Saltpeter Cave Survey, 2006 : Journal of Spelean History, Vol.40,No.2, Issue 132 (July-December ,2007 |
| Plemons, Douglas (2006) The United States Saltpeter Cave Survey, 2006 : Journal of Spelean History, Vol.40,No.2, Issue 132 (July-December ,2007 |
| Howard, J. Michael (2007) Bulletin Vol. 23, Mineral Species of Arkansas - A Digest (2nd ed.) Arkansas Geological Commission |
Searcy County, Arkansas, USA