@article{GDZPPN002183706,
title = {On the class number of relative abelian fields.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {238},
year = {1969},
pages = {1-10},
zbl = {0175.04601},
url = {http://dml.mathdoc.fr/item/GDZPPN002183706}
}
Ramachandra, K. On the class number of relative abelian fields.. Journal für die reine und angewandte Mathematik, Tome 238 (1969) pp. 1-10. http://gdmltest.u-ga.fr/item/GDZPPN002183706/