1. Puget Sound Maps Stanford University Public content Relief shown by contours. Depths shown by soundings. "Plate no 2851.". U.S. Coast and Geodetic Survey.
2. Semiahmoo Bay, Washington Maps Stanford University Public content Relief shown by contours; contour interval 20 ft. Depths shown by isolines and soundings. "No. 6399.". U.S. Coast and Geodetic Survey.