Manuel de la Hera Pacheco Copper-plate Restoration for Charts of Spanish Hydrographic Institute PDF (English)
M. A. Gougenheim Use of Equal Altitudes Instruments for Accurate Determination of Latitudes PDF (English)
M. Ch. Pace Special Chart for Direct Plotting of Radiogoniometrical Bearings taken from Vessels or Aircraft PDF (English)
A. W. Jacobson An Instrument for Recording continuously the Salinity, Temperature, and Depth of Sea Water PDF (English)
Hossein Ali Razmara Razmara Method of Teaching Topographic Surveying and Geodetic Operations PDF (English)
