By Captain J. Y. Cousteau
By James Kendall
By Ivor B. N. Evans
By L. Harrison Matthews, Maxwell Knight
By Sir Arthur Keith
By Hawthorne Daniel, Francis Minot
By Leslie Brown
By Ludwig Koch
By R. M. Lockley
By F. Sherwood Taylor
By Sherwood Taylor
By Harley Williams
By Richard Carrington
By Major-General Walter Dornberger
By Ritchie Calder
By John Crompton
By Ronald Hare
By H. G. Vevers
By Blanche Stillson
By Eugenie Clark
By J. G. Crowther