1. Preliminary tests of the gases at Sulphur Banks, Hawaii;Allen;Bull. hawaii. volc. Obs.,1922
2. A chemical study of the fumaroles of the Katmai Region;Allen;Pap. Natur. geogr. Soc. Katami Ser.,1923
3. Particles in volcanic fume;Cadle;Nature,1967
4. Sur l'analyse des emanations volcaniques de l'Archipel des Nouvelles-Hebrides;Chaigneau;C. R.,1960
5. Water and volcanic activity;Day;Bull. geol. Soc. Amer.,1913