Refractional influences in astrometry and geodesy : symposium no. 89 / organized by IAU in cooperation with IAG and IUGG, held in Uppsala, Sweden, 1-5 August 1978 ; edited by Erik Tengström and George Teleki, with the cooperation of I. Ohlsson.
Refractional influences in astrometry and geodesy : symposium no. 89 / organized by IAU in cooperation with IAG and IUGG, held in Uppsala, Sweden, 1-5 August 1978 ; edited by Erik Tengström and George Teleki, with the cooperation of I. Ohlsson.