TY  - BOOK
AU  - Lankford,Francis G., Ulrich, James F.
AU  - x
TI  - Essential mathematics: x 
SN  - x     
U1  - 510/LAE(3)  
PY  - 1975///
CY  - N. Y. 
PB  - Harcourt Brace Jovanovich
KW  - Mathematics
ER  -