reference book 
noun
1A book intended to be consulted for information on specific matters.It is of considerable value as a reference book - to be consulted for specific information on the general content, hierarchy and location of sources....
- The principal use for this book is as a reference book and a guide to sources, unless one is offering a course on legal history, the history of international law and practice, peace keeping, or some such kindred subject.
- It is less a book to be read through from start to finish than a guide book to be read in conjunction with the Confessions or a reference book to be consulted on specific topics.
2South African historical another term for pass1 (sense 3 of the noun).
- proto-rebel
- protorosaur
- protorosaurian
- Protorosaurus
- protosalt
- protoscientific
- protoscientist
- protoscolex
- protosolar
- protosome
- protospathar
- protospatharios
- protospatharius
- protospermatoblast
- protospore
- protostar
- protostele
- protostelic
- protostellar
- protostomatous
- protostome
- protosulfate
- protosulphate
- protosun
- protosyntactical