The Division on Foreign Relations of the National Academy of Sciences-National Research Council was established in 1919. In 1946 the name was changed to Division of International Relations; in 1952, to Office of International Relations, and in 1962, to the Office of the Foreign Secretary. In 1974 the newly-established Commission on International Relations assumed some of the functions of the Office of the Foreign Secretary which continued to exist under the same name. Works by these bodies are found under the following headings according to the name used at the time of publication: National Research Council (U.S.). Division on Foreign Relations. National Research Council (U.S.). Division of International Relations. National Research Council (U.S.). Office of International Relations. National Academy of Sciences (U.S.). Office of the Foreign Secretary. National Research Council (U.S.). Commission on International Relations. SUBJECT ENTRY: Works about these bodies are entered under one or more of the names resulting from the separation. Works limited in coverage to the pre-separation period are entered under the name of the original body. In the case of change of name, entry is made under the name used during the latest period covered.

The Dept. of Visual Instruction of the National Education Association of the United States was established in 1923. In 1932 the dept. absorbed the National Academy of Visual Instruction (established in 1920 and later consolidated with the Visual Instruction Association of the U.S.) In 1947 the name of the Dept. of Visual Instruction was changed to Dept. of Audiovisual Instruction. In 1969 the dept. became a national affiliate of NEA, and in 1970 its name was changed to Association for Educational Communications and Technology. Works by NEA's Dept. of Visual Instruction and Dept. of Audiovisual Instruction are found under National Education Association of the United States. Dept. of Audiovisual Instruction. Works by the other bodies are found under the following headings according to the name used at the time of publication: Visual Instruction Association of the U.S. National Academy of Visual Instruction. Association for Educational Communications and Technology. SUBJECT ENTRY: Works about these bodies are entered under the name or names in existence during the latest period for which subject coverage is given. In the case where the required name is represented in this catalog only under a later form of the name, entry is made under the later form.