Published: 1969-06-08

A noie on the loss of hydrogen and the supply of hydrogen to the Earth as a direct or indirect effect of the solar wind

N. A. BARRICELLI, R. METCALFE

105-109

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Modification of a method of Galanopoulos for determining earthquake risk

R. MAAZ

111-114

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Earthquake sequences and seismicity of the Watsonville Region of Central California

A. UDÌAS

115-145

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Rilevamento geomagnetico degli apparati vulcanici Vicano e Sabazio

F. MOLINA, A. SONAGLIA

147-162

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A Theory of the Origin of the Solar System

V. MITRA

163-187

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