"Tantingco: The Kapampangan in Us". Archived from the original on 2024-01-23. Retrieved 2024-01-23. "At one point, Pampanga’s borders extended all the way to Palanan, Isabela in the north and to Infanta, Quezon in the south, with the Pacific Ocean on its east side and the China Sea on its west side." (Baler which was the origin of Spanish forces and Tagalog settlers who settled Palanan was part of Pampanga along with Casiguran.)
"Tantingco: The Kapampangan in Us". Archived from the original on 2024-01-23. Retrieved 2024-01-23. "At one point, Pampanga’s borders extended all the way to Palanan, Isabela in the north and to Infanta, Quezon in the south, with the Pacific Ocean on its east side and the China Sea on its west side." (Baler which was the origin of Spanish forces and Tagalog settlers who settled Palanan was part of Pampanga along with Casiguran.)
