00430ntaaa2200169 45000030003000000050017000030080021000200400037000410820017000781000023000952450038001182500010001562600054001663000010002205000015002306500015002450120251027202713.00714s1973 ag 01 aAR-BaBNbspacAR-BaBNeaacrdRIC a550.1000 St3 aSteele, J. Dorman aFourteen weeks in popular geology a1 ed. aNew York : bAmerican Book Company, cc1870, 1877 a280 p aGeología ageología