@misc{hargens_remote_sensing_1991, 
author={Hargens, U.,Schrader, M.,Simmer, C.},
title={Remote sensing of cloud liquid water},
year={1991},
howpublished = {conference lecture: Wien (A); 14. August 1991},
note = {Online available at: \url{} (DOI). Hargens, U.; Schrader, M.; Simmer, C.: Remote sensing of cloud liquid water. XX. General Assembly of the International Union of Geodesy and Geophysics. Wien (A), 1991.}}