Official VW Service Manual - 1970-1979 Beetle - Super Beetle - Karmann Ghia - 11-0800
Volkswagen Beetle 1300/1500 Owner's Workshop Manual (Service & repair manuals) Revised Edition by Haynes, J. H., Stead, D. H. published by J H Haynes & Co Ltd (1988): Amazon.com: Books
VW Beetle & Karmann Ghia 1954 through 1979 All Models (Haynes Repair Manual): Ken Freund, Mike Stubblefield, John H. Haynes: 9781850107293: Amazon.com: Books