Lars Malmquist Distance Keeping and Frequency Synchronization in Swedish Hydrographic Surveying (Parallel Sounding) — 1972 PDF (English)
F. L. Slattery "Hydas" and "Hysurch" — The Present and Future in Hydrographic Survey Systems at the U.S. Naval Oceanographic Office PDF (English)
A. S. Laughton, D. G. Roberts, R. Graves Deep Ocean Floor Mapping for Scientific Purposes and the Application of Automatic Cartography PDF (English)
