TY  - BOOK
AU  - Litmann,Mark
TI  - Planets beyond : discovering the outer solar system
SN  - 047161128X
U1  - QB/681 
PY  - 1988///
CY  - New York
PB  - John Wiley & Sons
KW  - Neptune (Planet).
KW  - Pluto (Planet).
KW  - Uranus (Planet).
ER  -