THE VALLEY OF TEN THOUSAND SMOKES: 1, THE FUMAROLIC INCRUSTATIONS AND THEIR BEARING ON ORE DEPOSITION: 2, THE ACID GASES CONTRIBUTED TO THE SEA DURING VOLCANIC ACTIVITY
Zies, E. G., 1929, The Valley of Ten Thousand Smokes: 1, The fumarolic incrustations and their bearing on ore deposition: 2, The acid gases contributed to the sea during volcanic activity: National Geographic Society Contributed Technical Papers, Katmai Series 0004, 79 p.