00251nam a2200097Ia 4500080002200000100002000022245003200042260003400074300002700108583001800135  aREF 19.02.09 H236  aHavers, John A.  aHeavy of heavy construction  bMcGraw-HillaNew YorkUSc1971  a1 v. (various pagings)  c3/20/06kJOYD