Feinberg, Hilda Title derivative indexing techniques a comparative study by Hilda Feinberg - Metuchen, N.J. Scarecrow Press 1973 - x, 297 p. ; 29 cm. Bibliography: p. 279-291. ISBN: 0810806029 LCCN: 73-002671 Subjects--Topical Terms: Automatic indexingPermutation indexes