TY  - BOOK
AU  - Niven,Larry
AU  - Keefe,Francis Barry
TI  - Ringworld
T2  - Ballantine Books science fiction
SN  - 0345333926
AV  - PS3564.I9 
PY  - 1985///
CY  - New York
PB  - Del Rey
KW  - Ringworld (Imaginary place)
KW  - Fiction
KW  - Science fiction
N1  - "A Del Rey book."
N2  - Two humans and two aliens, who are traveling to distant reaches of space to prevent a future catastrophe, crash on a ringworld apparently created by superior technologies
ER  -