A study was conducted to investigate censorship attempts in Maryland during the period 1966-1975 by consulting issues of the "Newsletter on Intellectual Freedom" published by the American Library Association's Office of Intellectual Freedom. The areas covered included locations, sources, and reasons for censorship attempts; the institutions affected; the materials censored; and the results of the attacks. Findings showed an increase in censorship attempts after 1970, a censorship rate for the state of Maryland 68% higher than the national rate, and a higher rate in urban areas of Baltimore and near Washington, D.C. Educational institutions had approximately 50% more censorship attempts than noneducational institutions. The largest number of complaints in schools was from parents, and the largest number of attempts among noneducational institutions came from the Maryland Board of Motion Picture Censors. The major reason for censorship was obscenity or obscenity related factors. Other reasons included upholding the image of the city of Baltimore, which resulted in the banning of the television show "Hot L Baltimore." Results also indicated that 60.5% of all censorship attempts were successful. (Lists are provided of the kinds of institutions and the titles of the materials under censorship attack.) (MKM)