1. Introduction

   • D. F. Merriam

   EditorialNotes Pages: 361 - 362

2. On the need, design, and prospects for an electronic information system serving igneous petrology

   • Felix Chayes

   OriginalPaper Pages: 363 - 371

3. Relative effectiveness of geologists and computers in mapping potential hydrocarbon exploration targets

   • E. C. Dahlberg

   OriginalPaper Pages: 373 - 394

4. Analysis of the rate of wildcat drilling and deposit discovery

   • Lawrence J. Drew

   OriginalPaper Pages: 395 - 414

5. Exploration geochemistry—Distribution of elements and recognition of anomalies

   • G. J. S. Govett
   • W. D. Goodfellow
   • C. Y. Chork

   OriginalPaper Pages: 415 - 446

6. Variation in the value of mineral resources. Part I. The USA

   • J. C. Griffiths
   • W. D. Menzie

   OriginalPaper Pages: 447 - 472

7. Association announcements

   • W. W. Hutchison

   Announcement Pages: 473 - 483

8. Reviews

   • Daniel F. Merriam
   • R. A. Reyment
   • Marie Morisawa

   OriginalPaper Pages: 485 - 492