00591nam a2200217 4500 20170420114417.0 000 000 000 041247140X UOEL GB54.5 .W48 1992 White,I.D Environmental systems : an introductory text / by I.D white, D.N Mottershead and S.J Harrison 2nd ed. London : Chapman and Hall, c1992. x, 616 p . : ill. Includes Index and Bibliographical references Environmental systems lcc LL 12771 12771