Air pollution´s toll on forests and crops / edited by James J. MacKenzie, Mohamed T. El-Ashry. — New Haven : Yale University Press, [1989]. — CIDIMA. — 376 p. : gráf., tab. ; 24 cm. — ( Science) Precede al tit.: A work resources institute book ISBN 0-300-05232-4 1. Contaminación atmosférica.2. Bosques.3. Agricultura. I. MacKenzie, James J, ed.. II. El-Ashry, Mohamed, ed.. 504.3.054:63