Magnetic results from Huancayo Observatory, Peru, 1922-1935
by Carnegie Institution of Washington. Dept. of Terrestrial Magnetism, H. F. Johnston, A. G. McNish, S.E. Forbush, W. E. Scott, Ella Balsam, P. G. Ledig
Geomagnetism--Peru--Huancayo--Observations
<p>Carnegie Institution of Washington publication 175, vol. X-A</p><p></p>"Researches of the Department of Terrestrial Magnetism, vol. X-A"
Writing a summary for young readers…
For young readers
Book data: Open Library