A huge amount of information on light sources, fixers, developers, films, intensifiers, papers, reducers, replenishers and toners. The book is organised by supplier, mainly Agfa, Kodak, GAF and Ilford. Of particular note are the formulae for all the well known developers of the time and the section on colour film development.
I still dip into this book, but for most people, it's probably overkill, unless historiography is your thing. Indeed most films and papers have been reformulated since this book was published. However there are some nuggets to be mined from it.
Compact Photo Lab Index, ed. E Pittaro