Harold F. Hennigar, Jr.

Richard J. Greenwald, Harold F. Hennigar Jr.; Designation of an ocean mining stable reference area, Proceedings of MTS/IEEE OCEANS'88 Conference, pp. 752 - 761, October 1988.

Harold F. Hennigar; Design of Devices to Measure Thickness and to Acquire Engineering Test Samples of Cobalt Crust, Proceedings of MTS/IEEE OCEANS'87 Conference, pp. 1027 - 1030, September 1987.