Bosch "Gasoline & Diesel Injection Products Catalog" 221132 (1996)
Source: Robert Bosch Corporation
Sales Group
2800 South 25th Ave.
Broadview, IL 60153

"PORSCHE Troubleshooting Guide K-Jetronic" 4533.20 2/78 (Approx 6" x 8" spiral bound book)
Porsche AG
Postfach 400 640
D7000 Stuttgart 40

(The above book is out of print. Copies are available at a cost of $15 including mailing costs.)

Bosch "Mechanical Gasoline Fuel-Injection System with Lambda Closed-Loop Control K-Jetronic" ISBN 1-85-226030-0. (Pamphlet with theory, pictures.)

"Bosch Fuel Injection & Engine Management" by Charles O. Probst, SAE
ISBN 0-8376-0300-5 Robert Bently, Pub. (Covers all the Bosch basic systems, Porsche non-specific).

Porsche Factory Workshop Manuals covering the '74 - '83 cars. (These manuals have much of the important stuff, but there are still bits and pieces to be picked up in the other books listed. )

Solving Bosch Continuous Injection System (CIS) Problems, by James Weber,
future education inc. 1-800-475-0727
(Good theory, diagnosis, and repair but not Porsche specific)

How toTune & Modify Bosch Fuel Injection, by Ben Watson,
Motorbooks International 1-800-826-6600 isbn 0-87938-570-7
(Good theory, diagnosis, tricks, and repair but not Porsche specific)

PCNA's "Parts and Technical Reference Catalog" (911 Models 1974-1989) PNA 000 147
(Not a CIS book per se, but has some handy parts illustrations on the CIS parts.)

Porsche tecnical specification book for your year car
(Everything from bolt torques to alignment info. This is a must have
book even if you never work on your own car)

Taken altogether, I don't think this reference material leaves much out. Perhaps others will pick up on something not listed here, and if so let me know and I'll add it to the list.