TY  - GEN
TY  - GEN
T1  - Topographic-isostatic reduction maps for Europe and North Atlantic in the Hayford zones 18 [kongruenssi] 1 for the Airy-Heiskanen system, T = 30 km and 20 km
T2  - Annales Academiae scientiarum Fennicae
A1  - Heiskanen, W. A., 1895-1971
A2  - Kärki, P.
A2  - Niskanen, E.
LA  - eng
PP  - Helsinki
PB  - Suomalainen tiedeakatemia
YR  - 1959
UL  - https://kansalliskirjasto.finna.fi/Record/helka.999149293506253
NO  - Sama: Publications of the Isostatic Institute of the International Association of Geodesy 31.
ER  -