Porer, J. (1998). Schwalben-Kataster für 1997.
Chicago Style (17th ed.) CitationPorer, Johann. Schwalben-Kataster Für 1997. 1998.
MLA (9th ed.) CitationPorer, Johann. Schwalben-Kataster Für 1997. 1998.
Warning: These citations may not always be 100% accurate.