APA
Horner H., Poder K. & International Association of Geodesy. (1989). The European Datum 1987 (ED87): report on the symposium of the IAG subcommission for the new adjustment of the European triangulation (RETrig) held in Lisbon 10-13 May 1988 (and) ... Report on the meeting of the IAG Subcommission for the European Reference Frame (EUREF) held in Munich 20-21 October 1988. Muenchen: International Association of Geodesy.
Chicago
Horner Helmut, Poder Knud and International Association of Geodesy. 1989. The European Datum 1987 (ED87): report on the symposium of the IAG subcommission for the new adjustment of the European triangulation (RETrig) held in Lisbon 10-13 May 1988 (and) ... Report on the meeting of the IAG Subcommission for the European Reference Frame (EUREF) held in Munich 20-21 October 1988. Muenchen: International Association of Geodesy.
Harvard
Horner H., Poder K. and International Association of Geodesy. (1989). The European Datum 1987 (ED87): report on the symposium of the IAG subcommission for the new adjustment of the European triangulation (RETrig) held in Lisbon 10-13 May 1988 (and) ... Report on the meeting of the IAG Subcommission for the European Reference Frame (EUREF) held in Munich 20-21 October 1988. Muenchen: International Association of Geodesy.
MLA
Horner Helmut, Poder Knud and International Association of Geodesy. The European Datum 1987 (ED87): report on the symposium of the IAG subcommission for the new adjustment of the European triangulation (RETrig) held in Lisbon 10-13 May 1988 (and) ... Report on the meeting of the IAG Subcommission for the European Reference Frame (EUREF) held in Munich 20-21 October 1988. Muenchen: International Association of Geodesy. 1989.
