@article{van_der_Laan_1975,
title={Bridging the gap in radio astronomy},
volume={256},
ISSN={1476-4687},
url={http://dx.doi.org/10.1038/256763a0},
DOI={10.1038/256763a0},
number={5520},
journal={Nature},
publisher={Springer Science and Business Media LLC},
author={van der Laan,
H.},
year={1975},
month=aug,
pages={763–763} }