@inbook{+2014+7+8,
url = {https://doi.org/10.1515/9783110367560.7},
title = {§ 1. Introduction},
booktitle = {The Rocket into Planetary Space},
publisher = {De Gruyter Oldenbourg},
address = {Berlin, München, Boston},
pages = {7--8},
doi = {doi:10.1515/9783110367560.7},
isbn = {9783110367560},
year = {2014},
lastchecked = {2026-05-03}
}