supply those documents not available to the researchers. will be limited to the NAEG and its contractors. This service When NAEG researchers notify the Information Center of their interests and research projects, they are automatically alerted to incoming documents that match their needs. Another new approach in use is to send NAEG researchers bimonthly or quarterly individualized updated searches from the computerized information file. For these procedures to be effective, feedback on their usefulness is necessary in each case in order to select subsequent specific applicable information. Selecting and computerizing information within the scope of the NAEG project from the classified literature is a second aspect of the project. This classified literature reposes in the vault of the Technical Information Center in Oak Ridge. From the classified literature, bibliographic and descriptive information has been selected, cleared, and entered into the computerized file. This activity is a logical extension of a continuing project to locate and extract pertinent information from early literature. The information extracted from the classified documents is, however, necessarily scant. Some of the data contained within a document can be described by subject categories and key words, which have been cleared by a security officer, i.e., the radionuclide, the type of study, the methods, and the nonsensitive results will be noted. The collaboration of the NAEG Information Center with the Comparative Animal Research Laboratory (CARL) in Oak Ridge is a recent project. A handbook of tabular data extracted by the CARL scientific staff on pluntonium in mammals will be published soon by CARL. sent to interested NAEG contractors. It will be The CARL data were designed to merge with the NAEG Information Center computerized information file and will be available for specific searches fitting NAEG needs. Since the NAEIC began in January of 1972, the scope of the project has grown as needs and interests of the NAEG have expanded. The initial interest and continuing primary concern are plutonium in the environment, particularly that of the Nevada Test Site. Table l relates some of the scope changes to the publication dates of the bibliographies. Ecology of the Nevada Test Site was added before the first publication in September, 1972. 156 Uranium was added in time to