History of ITU Portal – Documents & dynamic web pages

Green Book (1954): Annexes to Volume IV: Quality of Transmission (Documentation on Methods of Specification and Measurement); Telephone Equipment

Green Book (1954): Volume V: Signalling and Switching: Part 1 - Signalling in the Manual Service; Part 2 - General Recommendations Relating to Signalling in the Semi-Automatic Service; Part 3 - Guiding Principles for the Maintenance of Semi-Automatic Circuits; Part 4 - Specifications for Standard International Signalling and Switching Equipment.

Green Book (1954): Volume VI: Operating and Tariffs: Part 1 - CCIF Recommendations Concerning International Telephone Operating and Tariffs (Geneva, 1954); Part 2 - Miscellaneous Documentation.

Recommendations for the Protection of Underground Cables Against the Action of Stray Currents Arising from Electric Traction Systems: Text Approved by the XVIth Plenary Assembly of the International Telephone Consultative Committee (CCIF) (Firenze, 1951)

Green Book (1954): Volume V: Signalling and Switching: Part 1 - Signalling in the Manual Service; Part 2 - General Recommendations Relating to Signalling in the Semi-Automatic Service; Part 3 - Guiding Principles for the Maintenance of Semi-Automatic Circuits; Part 4 - Specifications for Standard International Signalling and Switching Equipment.

Green Book (1954): Volume VI: Operating and Tariffs: Part 1 - CCIF Recommendations Concerning International Telephone Operating and Tariffs (Geneva, 1954); Part 2 - Miscellaneous Documentation.

[Pink Book (1927):] Comité Consultatif International des Communications Téléphoniques à Grande Distance: Plenary Session, Como, 5th-12th September, 1927.

Red Book (1956): Volume I: List of Participants; Minutes of the Meetings of the First Plenary Assembly; Resolutions Issued by the First Plenary Assembly; Questions to be Studied; Study Groups and Sub-Study Groups in 1957, 1958 and 1959.

Red Book (1960): Volume I bis: Part I: List of Participants; Minutes of the Meetings of the Plenary Assembly; Reports, Resolutions, Opinions; Study Groups in 1961-1964. Part II: Means of Expression.

Red Book (1960): Volume II bis: Part I: Telephone Operation and Tariffs: Recommendations Series E and Questions Study Group II. Part II: Telegraph Operation and Tariffs: Recommendations Series F and Questions Study Group I. Part III: Questions Study Group III: General Tariff Principles and Costing – Lease of Circuits.