Charts. Laguna de Bay, central Luzon, P. I., hydrographic surveys to 1920, topographic surveys by U. S. Engineers to 1913; with inset. Napindan Channel, Laguna de Ray, P. I., Pasig River approach, surveyed 1920; chart 4230. Scale 1:60,000.
Publication Title:
Laguna de Bay, central Luzon, P. I., hydrographic surveys to 1920, topographic surveys by U. S. Engineers to 1913; with inset. Napindan Channel, Laguna de Ray, P. I., Pasig River approach, surveyed 1920; chart 4230. Scale 1:60,000.
Display Title:
Charts. Laguna de Bay, central Luzon, P. I., hydrographic surveys to 1920, topographic surveys by U. S. Engineers to 1913; with inset. Napindan Channel, Laguna de Ray, P. I., Pasig River approach, surveyed 1920; chart 4230. Scale 1:60,000.