Copyright © 1960 by Princeton University Press

Copyright © renewed by Princeton University Press, 1988

Preface copyright © 1990 by Princeton University Press

Introduction to the New Paperback Edition copyright © 2016 by
Princeton University Press

Published by Princeton University Press, 41 William Street

Princeton, New Jersey 08540

In the United Kingdom: Princeton University Press

6 Oxford Street, Woodstock, Oxfordshire, OX20 1TR

All Rights Reserved

Tenth paperback printing and
first printing with the new preface, 1990

First printing of the new paperback edition,
with a new introduction, 2016

L.C. Card 60-5748

Cloth ISBN: 978-0-691-07952-3

New Paperback ISBN: 978-0-691-17252-1

Printed in the United States of America

Printed on acid-free paper ∞

1 3 5 7 9 10 8 6 4 2