@misc{weitkamp_measurements_with_1990, 
author={Weitkamp, C.},
title={Measurements with lidars during the ICE 89: overview},
year={1990},
howpublished = {conference lecture: Villeneuve d'Ascq (F);},
note = {Weitkamp, C.: Measurements with lidars during the ICE 89: overview. International Cirrus Experiment Third Workshop. Villeneuve d'Ascq (F), 1990.}}