Bd. 1. 1856
http://books.google.com/books?id=T3BMAAAAMAAJ
http://hdl.handle.net/2027/mdp.39015013136356
Bd. 2. 1856
http://books.google.com/books?id=x3BMAAAAMAAJ
http://hdl.handle.net/2027/mdp.39015013136349
Bd. 3. 1856
Bd. 4. 1856
Bd. 5. 1856
http://books.google.com/books?id=R3FMAAAAMAAJ
http://hdl.handle.net/2027/mdp.39015033370217
Bd. 6. 1856
Bd. 1. 1856
http://books.google.com/books?id=T3BMAAAAMAAJ&pg=PP7
http://hdl.handle.net/2027/mdp.39015013136356?urlappend=%3Bseq=7
Bd. 2. 1856
http://hdl.handle.net/2027/mdp.39015013136349?urlappend=%3Bseq=7
Bd. 5. 1856
http://books.google.com/books?id=R3FMAAAAMAAJ&pg=PP9
http://hdl.handle.net/2027/mdp.39015033370217?urlappend=%3Bseq=9
Wikipedia, engl.
http://en.wikipedia.org/wiki/John_Cassell