LIBRARIANS AND SCHOOL ADMINISTRATORS MUST LEARN TO UNDERSTAND CENSORSHIP ATTEMPTS AND THE METHODS OF OPPOSING THEM. CENSORSHIP GROUPS, THROUGH LIMITING ACCESS TO PARTICULAR WORKS, AIM AT UPHOLDING WHAT THEY FEEL ARE THE TRUE AMERICAN VALUES. THE CONSTITUTIONALITY OF CENSORSHIP IS UNCERTAIN, AND THE PREMISE UNDERLYING LEGAL CENSORSHIP--THAT READING CERTAIN MATERIALS DIVERSELY AFFECTS SOCIAL BEHAVIOR--HAS NOT BEEN EMPIRICALLY TESTED. IF THE PREMISE IS TRUE, ONLY COURTS HAVE THE AUTHORITY TO REGULATE THE DANGER. UNOFFICIAL CENSORSHIP, CARRIED OUT THROUGH INTIMIDATION BY PRESSURE GROUPS, MUST BE OPPOSED WITH DOCUMENTS IN INDIVIDUAL FREEDOM AND WITH ANTI-CENSORSHIP TECHNIQUES BY SCHOOL OFFICIALS. TWO EFFECTIVE DOCUMENTS ARE THE ALA'S "LIBRARY BILL OF RIGHTS" AND THE "FREEDOM TO READ STATEMENT" OF THE ALA AND THE AMERICAN BOOK PUBLISHERS COUNCIL. TECHNIQUES OF OPPOSING CENSORSHIP ARE DESCRIBED IN ALA'S "HOW LIBRARIES AND SCHOOLS CAN RESIST CENSORSHIP." (THIS ARTICLE APPEARED IN "JOURNAL OF SECONDARY EDUCATION," VOL. 40 (JANUARY 1965), 3-15.) (LH)