Dugan, Edwina F. Pilipinas sa makabagong mundo 2 : isang hamon / Edwin F. Dugan, may-akda ; Jose A. Alcala, patnugot. - Quezon City : FNB Educational, Inc., [2018], c2018. - vi, 426 pages : illustrations ; 28 cm K to 12. Bibliography: page 426. ISBN: 9789715149112 (paperback) Subjects--Topical Terms: Social sciences--Study and teaching (Elementary) LC Class. No.: LB1584.5.P5 Dewey Class. No.: 372.89071