Guillermo, Cleotilde C Professional problems encountered by pre-elementary school teachers in the Ilocos provinces / Cleotilde C. Guilerrmo. - 1983. - xxv, 240 leaves ; 28 cm. Thesis (Doctor of Education) -- University of Baguio, Graduate School, Baguio City Bibliography: leaves 197-202. Subjects--Topical Terms: Early childhood teachers.