Symposium of the IAG Reference Frame Sub-Commission for Europe (EUREF) in Tallinn, May 22-24, 2019
Kollo, Karin
;
Ellmann, Artu
;
Poutanen, Markku
IAG Newsletter
2019
/
p. 6-7 : phot
https://iag-aig.org/doc/5d29c4313d37a.pdf