TY  - BOOK
T1  - Elements of graphics :how to prepare charts and graphs for effective reports /
DA  - c1981.
CY  - New York :
AU  - Lefferts, Robert.
ET  - 1st ed.
CN  - QA90 .L413
CN  - QA90
PB  - Harper & Row,
PP  - New York :
PY  - c1981.
N1  - Includes index.
ID  - 66039
KW  - Graphic methods.
SN  - 0060125780 :
TI  - Elements of graphics :how to prepare charts and graphs for effective reports /
ER  -