E.J. Halsema : colonial engineer a biography. - Halsema, James J. (Quezon City New Day Publishers, 1991)
Revised version of the biography which appeared serially in Bulletin of the American Historical Collection in Manila
Fi-10655g donated by Prof. Mamoru Tsuda, M.A.,U.P.,1977.
Keywords: Halsema, Eusebius Julius; Americans -- Philippines; Baguio City -- History; Engineers -- Biography