00919nam a2200253Ia 4500999001900000001000700019005001700026008004100043010001500084020001500099040000800114041000800122049000900130050002000139082001200159245010300171260004000274300003700314500002000351650004000371710006100411942001600472952017700488  c244881d24488132776820170605103734.0140811s1992    dcua          001 0 eng    a 92030615   a0870448366  aBEA0 aeng  abeag00aTA15b.B85 199200a62022004aThe Buildersbmarvels of engineeringcpublished by the Book Division, National Geographic Society.  aWashington, DCbThe Societycc1992.  a288 p.bill. (some col.)c29 cm.  aIncludes index. 0aEngineeringxHistory.9920632Local2 aNational Geographic Society U.S.bBook Division.9141296  c6hTA15.B85  00102lcc406TA0015 B85  01992708beal9179065a4b4c33d2016-05-27edonativog0.00i526109l0oTA15 .B85 1992p91000000039388r2016-05-27 00:00:00t0v0.00xr:327768y6