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

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

Manylion Llyfryddiaeth
Prif Awdur: Griffin, Donald Redfield 1915-
Fformat: Llyfr
Iaith:English
Cyhoeddwyd: Garden City, N. Y. Anchor Books c1959.
Cyfres:Science study series, S4
Pynciau:
Sound-waves.
Echo.
Orientation.