Letters were sent to all state departments of education or public instruction soliciting information and comments concerning the sharing of a portion of the public library building with other agencies such as public school administrations. Twenty-two replies were received from nineteen states. Over 50% of the respondents were in favor of the proposal under the following conditions: (1) the library keeps ownership of the building, (2) space lease is for a specified period of time and is recoverable by the library if needed, (3) the building is designed as a public library facility, (4) the library's functions would not be hampered, (5) the venture would help defray capital outlay and provide space for future needs, (6) access to school space be separate from library entrances, (7) utility and maintenance costs by shared, (8) sufficient parking be provided, (9) telephone services by separate and (10) availability of federal funds be investigated. The strongest opposition among the respondents came from members of the library profession because past experiences in extra-library cooperation are disheartening. (NH)