TY  - BOOK
ED  - Encyclopedia Britannica
TI  - britannica book of the year 1981
SN  - 0-85227-381-X
PY  - 1981///
CY  - Chicago
PB  - Encyclopaedia Britannica
KW  - Astronomy and Astrophysics thesaurus
KW  - Year Books-Encyclopaedia
ER  -