@article{Schmid2001,
  author    = {Adolf Schmid},
  title     = {150 Jahre Briefmarken in Baden},
  journal   = {Badische Heimat},
  series    = {gesucht: Datumsstempel 1. Mai 1851},
  volume    = {81},
  number    = {4},
  pages     = {700 -- 706},
  doi       = {10.57962/regionalia-21557},
  year      = {2001},
}