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 file of USDA bulletins, State Agricultural
 Experiment Station and Extension Service pub-
 lications, Agricultural Yearbooks, and publi-
 cations of other states having similar types of
 agriculture, in addition to farm magazines and
 periodicals and the leading scientific journals
 pertinent to the principal areas of agriculture.
 The reference materials available shall apply
 to all types of farming in the State, including not
 only major enterprises but minor and contrib-
 utory undertakings as well. In all cases, the
 library shall include a minimum of 2, 500
 volumes of different titles in the field of agri-
 culture in addition to an adequate supporting
 library. The library shall be under the super-
 vision of a trained librarian.

 Facilities for the training of potential teachers
 in the use of audio-visual aids should be avail-
 able.

 4.52 Procedures for Determining Whether the Applying
 Institution has Facilities and Staff for Technical
 Instruction at Least Equal to Those of the State College
 of Agriculture. Adequacy of facilities and staff for
 technical instruction will be determined by a committee
 appointed by the state superintendent of public instruction
 and executive officer upon the recommendation of the state
 director who will be provided with nominations by the
 state supervisor.


5.0 PLAN FOR COORDINATING STUDIES, INVESTIGATIONS, RESEARCH,
 AND PREPARATION AND DISTRIBUTION OF PROFESSIONAL AND
 TECHNICAL MATERIAL FOR EMPLOYED TEACHERS

 Research may be conducted by the teacher-training institutions, by
 county boards of public instruction through the local coordinators,
 and by the State Board for Vocational Education through the State
 Department of Education, when the research is confined to one of
 the following areas of study:

 Identifying and determining agricultural training needs
 Methods of instruction
 Supervision of instruction
 Instructional facilities and materials
 Agricultural employment and occupations