The Fortran 2003 Handbook: The Complete Syntax, Features and Procedures
From the reviews:"It is a comprehensive treatise of the language that complements the latest incarnation of the Fortran standard. … It is particularly remarkable to see how much Fortran has changed over the years, while maintaining compatibility with earlier versions. … The book does a good job of explaining all these in depth, meriting it a place on serious Fortran developers’ bookshelves. It will also help non-Fortran developers who want to understand and read Fortran programs … ." (Panagiotis Louridas, ACM Computing Reviews, June, 2009)