The Major League
Michel publishes a wide range of German, European, all-world and specialized and catalogues. The Michel catalogues are the standard reference in Germany and throughout much of Europe.
The Scott Catalogue is made up of eight volumes and lists more than 600,000 individual stamps from more than
600 different countries. The company also produces Specialized catalogues for United States stamps, and for
classic world stamps issued in philately's first 100 years. Each year improvements and modifications are
made to the catalogue.
The Scott catalogues are the standard reference in the USA.
Stanley Gibbons publishes the whole range of Great Britain, British Commonwealth, all-world, one-country, specialized and thematic (topical) catalogues. The Gibbons catalogues are the standard reference in the UK and many other countries.
Yvert & Tellier publishes a range of French, European, Overseas and specialized catalogues. The Y&T catalogues are the standard reference in France and French-speaking countries.