The twentieth edition of the Statistical Yearbook of the Bulgarian Kingdom for 1928 is available for the web users. The publication came out of print in 1929 and is structured in XXI sections on the principle of the previous statistical yearbooks, without an international review included. The publication contains the overall results of the 1926 census of population and housing. Domestic animals, poultry, vehicles, agricultural implements and machinery in the Kingdom are also counted. The results of the 1927/1928 centenarian survey are also published in this edition. The data relate to centenarians by municipality, district, sex, age and nationality, family status and occupation. The statistical yearbook consists of 502 pages and is in Bulgarian and French.