The Family Tree and History of Lamberto Hontiveros Tirol
The Woman Behind the Greening of Boracay, Historical Newspaper, Encyclopedia Britannica
The Woman Behind the Greening of Boracay, Reprinted, The Encyclopedia Britannica
Central Asian Academic Studies
Sofia Ner Gonzales vda. de Sr. Lamberto Hontiveros Tirol
Lamberto H. Tirol National High School
Some of the Heirs of Lamberto Hontiveros Tirol and Sofia Ner Gonzales
[The European Heritage Library
Balancing Paradise and Pandemonium
Peak into the History of Boracay Island
Except for titled properties, Boracay island is owned by the state
History of Boracay island briefly
Boracay island from the eyes of an Ati
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