Extraterrestrial Civilizations - Isaac Asimov
Also by Isaac Asimov:
EARTH: OUR CROWDED SPACESHIP
REALM OF NUMBERS
EXTRATERRESTRIAL CIVILIZATIONS
THIS BOOK CONTAINS THE COMPLETE TEXT OF THE
ORIGINAL HARDCOVER EDITION.
Published by Fawcett Columbine Books, a unit of
CBS Publications, the Consumer Publishing Division of
CBS Inc., by arrangement with Crown Publishers, Inc.
Copyright ©1979 by Isaac Asimov
ALL RIGHTS RESERVED
eISBN: 978-0-307-79230-3
v3.1
To the memory of Paul Nadan (1929-1978)
f ...