isostatic reduction maps for Europe and north Atlantic in the Hayford zones, 18-1, for the Airy-Heiskanen system, T=30 km and 20 km
By: by W. Heiskanen, E. Niskanen, and P. Kärki.
Series: Publications of the Isostatic Institute of the International Association of Geodesy -- no. 31
Publisher: Suomalainen Tiedeakatemia
Published: 1959
Place of publication: Helsinki
Language: eng
Subjects: Topographic maps.; Isostasy.; Europe -- Maps, Topographic.; North Atlantic Ocean -- Maps, Topographic.
Genres: Maps, Topographic.
Notes: Reprinted from the Annales Academiæ Scientiarum Fennicæ. Ser. A. III. Geoogica-Geographica, 54.

Includes bibliographical references (p. 4).
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