000			00349nam a2200157Ia 4500
008			181012s9999 xx 000 0 und d
020			_a9781449632342
082			_a333.7 WAL
100			_a"WALTHER, JOHN V"
245		0	_aEARTH'S NATURAL RESOURCES
250			_a1ST
300			_a428 P
365			_b5640
650			_aECONOMICS
942			_cREF
999			_c16903 _d16904