There is little if any tolerance of the free expression of ideas throughout the entire mass communications system. Because Bulgaria is more closely tied to the Soviet Union than most of the other Eastern European countries, the dictates of Moscow are virtually followed to the letter in the media. Themes that are initiated in Moscow are reiterated almost verbatim in Sofia. The major theme of the mass media is respect for and emulation of the Soviet Union, although recently some social themes--such as the problems of youth and alcoholism--have been incorporated as well. The only sources of information and entertainment permitted to the people are the domestically controlled mass media. Most Bulgarians distrust information available to them from these sources but, having no alternative, continue to use them. Historically, of all the mass communications systems, the press has always reached the largest number of people and has traditionally been viewed by the government as the most effective means of informing the general public. Although the circulation of the press dropped drastically in the mid-1940s, it has since the 1960s once again become the chief instrument of the mass communications system. Radio has greatly expanded in variety and scope since the 1940s. Television, although slow to develop and still limited in its audience relative to other European countries, has been growing rapidly since the early 1960s and was beginning to experiment with color in the early 1970s. There has been little change in the Bulgarian publishing industry since 1944. Owing to the government's fear of contamination by the West or other capitalist societies, there is very little importation of foreign books into the country. Although books have increased greatly in terms of sheer numbers of editions, the quantity of book titles has remained very much the same since World War II. Libraries range from those under the control of state ministries and committees to local reading rooms and enterprise libraries. The latter are generally more widely used by the people. Since the end of World War II the film industry has grown to a great extent. Like other instruments of the media, films are chosen for their propagandistic value; however, since the advent of television, fewer people have attended films. BACKGROUND The press--composed of newspapers and periodicals--was the most developed of the Bulgarian media in the first half of the twentieth century. Radio, which was introduced in the 1920s, was under the aegis of what was then the Ministry of Post, Telegraph, and Telephone. The production, importation, and sale of radios were unrestricted. The least developed communications system of the day was the film industry, which was privately owned and operated. Television was not initiated in the country until the mid-1950s.