Gregorio, Herman C. School administration and supervision / Herman C. Gregorio. -- -- Rev ed. -- -- Quezon City : Garotech Pub., c1961. xiv, 550 p. ; 22 cm. Includes index. ISBN: 971-871109-0 Subjects--Topical Terms: School administration.School supervision.Dewey Class. No.: Fil 371.2 G861 1961