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USA | |
| Howard, J. Michael (2007) Bulletin Vol. 23, Mineral Species of Arkansas - A Digest (2nd ed.) Arkansas Geological Commission |
| Howard, J. Michael (2007) Bulletin Vol. 23, Mineral Species of Arkansas - A Digest (2nd ed.) Arkansas Geological Commission |
| Howard, J. Michael (2007) Bulletin Vol. 23, Mineral Species of Arkansas - A Digest (2nd ed.) Arkansas Geological Commission |
| Howard, J. Michael (2007) Bulletin Vol. 23, Mineral Species of Arkansas - A Digest (2nd ed.) Arkansas Geological Commission |
| Howard, J. Michael (2007) Bulletin Vol. 23, Mineral Species of Arkansas - A Digest (2nd ed.) Arkansas Geological Commission Howard, J. Michael (1987) Mineral Species of Arkansas - A Digest. Bulletin Vol. 23 (1st ed.) Arkansas Geological Commission |
| Howard, J. Michael (2007) Bulletin Vol. 23, Mineral Species of Arkansas - A Digest (2nd ed.) Arkansas Geological Commission Howard, J. Michael (1987) Mineral Species of Arkansas - A Digest. Bulletin Vol. 23 (1st ed.) Arkansas Geological Commission |
| Howard, J. Michael (2007) Bulletin Vol. 23, Mineral Species of Arkansas - A Digest (2nd ed.) Arkansas Geological Commission |