Note A — Chapter I · THE SAUCER WORLDS

Following common practice in scientific discussion, we originally included the specific sources of important and/or controversial ideas described in this book and, for maximum accuracy, often used the original phrasing of the several authors involved. In this and certain other sections, however, we have been forced to abandon the more scholarly method of presentation because one author (Major Donald E. Keyhoe) refused permission to quote from his works.