Heidmann, Jean .
Extraterrestrail intelligence / by Jean Heidmann. - Cambridge : Cambridge University Press , 1997 - xxiii, 243p :
0-521-58563-5
Planetary system
B94 / N7
Extraterrestrail intelligence / by Jean Heidmann. - Cambridge : Cambridge University Press , 1997 - xxiii, 243p :
0-521-58563-5
Planetary system
B94 / N7