List of Contributors.
Foreword.
Geochemistry and Geology of Helium. - Carl A. Moore And Bijan Esfandiari.
Evaluation of Precipitation Records in Weather Modification Experiments. - Floyda Huff.
Charged Particles Trapped in the Earth’s Magnetic Field. - Donald Williams.
Photochemistry of Atmospheric Ozone. - H.U. Dutsoh.
Author Index.
Subject Index.