TY  - BOOK
AU  - Jones, A. J. Lawford
TI  - Digesting returns into summaries: graphical method, etc
U1  - 912 JON 
PY  - 0000///?
CY  - London
PB  - Isaac Pitman & Sons Limited
KW  - Graphic representations of earth's surface
KW  - Digesting returns into summaries
ER  -