an approach to the "Filipino first" policy and selected readings,
by Adrian and Rene Cristobal.
Cristobal, A. E., Cristobal, R. (1961). Filipino first: an approach to the "Filipino first" policy and selected readings. Manila.
Cristobal, Adrian E., 1932-, and Rene Cristobal. Filipino First: an Approach to the "Filipino First" Policy And Selected Readings. Manila, 1961.
Warning: These citations may not always be complete (especially for serials).