TY  - BOOK
TI  -  1990 Science Year: The World Book Annual Science Supplement
SN  - 0716605902
AV  - REF  Q 9 .S33 1989.
PY  - 1990///
CY  - Chicago, London
PB  - Scott Fetzer Company
N1  - Includes index and  bibliographical references
ER  -