TY - BOOK AU - HEAL,GEOFFREY TI - VALUING THE FUTURE: ECONOMIC THEORY AND SUSTAINABILITY SN - 0-231-11306-4 AV - HD 75.7 .H43 1998 PY - 1998/// CY - NEW YORK PB - COLUMBIA UNIVERSITY PRESS KW - Sustainable development N1 - includes bibliographical references and indexes ER -