https://archive.org/details/atf7596.0001.001.umich.edu (Publisher version)
igorot_clapp1908.pdf (Any fulltext), 7MB
Clapp, W. C. (Ed.). (1908). A vocabulary of the Igorot language as spoken by the Bontok Igorots: Igorot-English and English-Igorot. Manila: Bureau of Printing.