If anyone is interested, I have a copy of the aforementioned workshop manual which is of no use to me. It has the following sections: Grp 00 - Complete Car; 01 - Engine Main Mechanical Unit; 04 - Fuel System; 05 - Ignition, Starting, Charging System; 07 - Engine Cooling System; 13 - Gearbox and 40 - Electrical System.
It is designed to be used with the main Alfa 33 workshop manual.
Alternatively, someone can donate an Alfa 33 to me and then the manual would be of use...