Search Results       Your search for [subject]Tumbocon, Leticia W returned 1 record.           An Assessment of the attainment levels on Piaget's seven logical operations among urban (PNC) and rural (Malabon) children ages 7-16. by Oriondo, Leonora L. (Leonora Loyola).; 1982. Subject: Tumbocon, Leticia W; Students -- Rating of.          Add to Book Cart Relevance: 21.29%