An adaptation of Heilprin's model of the path of propagation of human messages is used to explore the truism that more experienced academic researchers tend to go directly to the published literature, while less experienced researchers may rely more on such secondary sources as indexes and other library reference and bibliographic services. The…

An international numerical coding structure is presented for classification of data on education according to level category, educational field, and program type. Explanation of the overall system and a guide for its use is followed by a listing of levels, fields, and programs of education in coded order. The various educational program…