Echoes of bats and men [seeing with sound waves].

Bibliografiske detaljer
Hovedforfatter:	Griffin, Donald Redfield 1915-
Format:	Bog
Sprog:	English
Udgivet:	Garden City, N. Y. Anchor Books c1959.
Serier:	Science study series, S4
Fag:	Sound-waves. Echo. Orientation.