Ringworld /
Niven, Larry.
Ringworld / Larry Niven. - New York : Ballantine Books, 1970. - 313 p. ; 18 cm.
0345247957
Science fiction.
Ringworld / Larry Niven. - New York : Ballantine Books, 1970. - 313 p. ; 18 cm.
0345247957
Science fiction.