Underwater calls of Leptonychotes (Weddell seal)

Published in 1965 in Zoologica, volume 50, issue 3, on pages 45-46

A device for the sonic tracking of large fishes

Published in 1965 in Zoologica, volume 50, issue 8, on pages 75-82

Vortices and fish schools

Published in 1965 in Zoologica, volume 50, issue 10, on pages 97-114