01087nam a2200289 i 450099100358237970753620021218132320.0021028s1994 us a b 000 0 eng d023107901Xb11834511-39ule_instDi.S.Te.B.A.eng333.7Rolston, Holmes495608Conserving natural value /Holmes RolstonNew York :Columbia University Press,c1994259 p. :ill. ;23 cmPerspectives in biological diversity seriesIncludes bibliographical referencesEnvironmental protectionMoral and ethical aspectsHuman ecologyPhilosophyNature conservationMoral and ethical aspects.b1183451127-04-1718-12-02991003582379707536LE003 333 ROL01.01 (1994)12003000034431le003-E0.00-l- 00000.i1208555818-12-02Conserving natural value897999UNISALENTOle00301-01-02ma -engus 01