000			00342nam a2200145Ia 4500
008			180612s9999||||xx |||||||||||||| ||und||
020			_a0-582-35597-4
041			_aen
082			_a333.7
100			_aKNAPP, B. J
245		0	_aChallence of the natural environment
260			_aU.K _bLongman Group _c1989
300			_a272P.
942			_cPR
999			_c46763 _d46763