00280nam a2200109Ia 450000500170000008000220001710000200003924500320005926000340009130000270012558300180015220260716043649.0  aREF 19.02.09 H236  aHavers, John A.  aHeavy of heavy construction  bMcGraw-HillaNew YorkUSc1971  a1 v. (various pagings)  c3/20/06kJOYD