TY  - BOOK
AU  - Havers, A John
AU  - Stybbs, W Frank
TI  - Handbook of heavy Conctruction
U1  - 624. 012. 4- 183. 2 
PY  - 1971///
CY  - New York
PB  - McGraw-Hill
KW  - Handbook of heavy Conctruction
ER  -