J. Karwowski On N.F. Kudriancev and E.G. Nikiforov's Article "About the Choice of Effective Constructions of the Measurement Instruments and Their Optimal Parameters for the Measurement of Sea-Currents in the Undulating Water Layer" PDF
E. Fichera, A. Pugliano Campaign for Determining the Longitude of the Fundamental Point of the Astronomic Observatory in Naples — I . — The Chauvenet Problem and the Determination of Longitude by Meridian Observations PDF
Gunther Zimmermann Simultaneous Determinations of Longitude and Latitude in Africa with the Prismatic Astrolabe PDF
Fr. National Geographical Institute Geodetic Connexion Between France and North Africa by Simultaneous Sighting on the Echo I Artificial Satellite PDF
