 According to a study by the Political Science Library at Thammasat University, from 1850 to 1999, 1,057 books and periodicals were officially banned by publication in the "Royal Gazette", including many books among the "100 books every Thai should read".Many titles reflect their era of anti-communist fervor but were published both in Thailand and abroad in Thai, Chinese, Vietnamese, Korean, Bahasa, English, German, French, and Spanish.Historically, this and other acts have been used to severely restrict press freedom, especially during the military governments of Plaek Pibulsonggram, Sarit Dhanarajata, and Thanom Kittikachorn (up to 1973).