Sh:f

Bib entry
@book{Sh:f,
 author = {Shelah, Saharon},
 title = {{Proper and improper forcing}},
 series = {Perspectives in Mathematical Logic},
 edition = {Second},
 year = {1998},
 pages = {xlviii+1020},
 isbn = {3-540-51700-6},
 publisher = {Springer-Verlag, Berlin},
 mrnumber = {1623206},
 mrclass = {03-02 (03E05 03E35 03E40 03E45 03E50)},
 doi = {10.1007/978-3-662-12831-2},
 referred_from_entry = {See [Sh:253], [Sh:263]}
}