Be expert with map & compass the complete orienteering handbook por Kjellstrom, Bjorn 1910-

Table of contents

Maps and compasses por Blandford, Percy W.

Be expert with map & compass the complete "orienteering" handbook por Kjellstrom, Bjorn 1910-

Magnetic compasses and magnetometers. por Hine, Alfred

Magnetic compass deviation and correction a manual of the theory of the deviations and mechanical correction of magnetic compasses in ships por Denne, W.

Hans Christian Oersted discovers electromagnetism. IN Technology's Past. por Karwatka, Dennis