00690nam a2200217Ia 450000100060000000300050000600500170001100800410002801000150006904300120008405000150009608200100011110000280012124500660014926000810021530000330029649000350032950000470036450400260041165000350043712733BIBL20160527190708.0710301s1968    nyuabc   b    00000 eng    a 68022959   an------0 aQE71b.O35  a557.310aOgburn, Charlton2Local14aThe forging of our continent.cConsultant: William G. Melson.0 a[New York]bAmerican Heritage Pub. Co.; distribution by Van Nostrandc[1968]  a160 p.billus., maps, ports.0 aThe Smithsonian library2Local  aPart of the illustrated matter is colored.  aBibliography: p. 155. 0aGeologyzNorth America.2Local