TY  - BOOK
AU  - Nichols,Herbert L.(Herbert Lownds).
AU  - Day,David A.
TI  - Moving the earth: the workbook of excavation 
SN  - 0-07-046484-7
AV  - TA715 N52 1999
PY  - 1999///
CY  - New York
PB  - McGraw-Hill
ER  -