| Publication Type: | Miscellaneous |
| Year of Publication: | 1934 |
| Notes: | HEIM, A. 1934. El Bernal de Horcasitas, a volcanic plug in the Tampico Plain, Mexico. Zeitschrift fur Vulkanologie, 15: 254-60. |
| Publication Type: | Miscellaneous |
| Year of Publication: | 1934 |
| Notes: | HEIM, A. 1934. El Bernal de Horcasitas, a volcanic plug in the Tampico Plain, Mexico. Zeitschrift fur Vulkanologie, 15: 254-60. |