@article{JRAM_1982__337_152490,
     author = {Frank III Gerth},
     title = {Counting certain number fields with prescribed l-class numbers.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {195--207},
     publisher = {mathdoc},
     volume = {337},
     year = {1982},
     zbl = {0485.12006},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1982__337_152490/}
}