By Toomer, Derek..
[Madrid] | [Danbury, CT] Interiberica, S.A. | Danbury Press 1975 .
144 p. , Includes index. | Translation of Invisible world. 27 cm..
8438200079 | 8438200265

By Lucas, Joseph..
Madrid | [s.l.] Interiberica | Danbury Press 1976 .
144 p. , Includes index. | Translation of Polar life. 27 cm..
8438200079 | 8438200346