By Freixedo, Salvador..
Madrid Daimon 1980 .
278 p. , On cover: Enigmas del universo.

By Freixedo, Salvador..
[Madrid] Editorial Algar 1983 .
210 p.

By Freixedo, Salvador..
Barcelona Ediciones Martínez Roca 1983 .
190 p.

By Freixedo, Salvador..
[Madrid] Editorial Algar 1984 .
210 p. 8474500222

By Ortega, Carmen..
México Editorial Tradición 1973 .
156 p.

By Freixedo, Salvador..
México | New York Editorial Isla 1973 .
[387] p. 20 cm..

By Freixedo, Salvador..
México, D.F. Editorial Grijalbo 2000 .
302 p. 23 cm..
9700512118 (pbk.)