One historic source claimed that 25,000 subjects participated in the raising of the building's corner posts alone.

One historic source refers to a mountain cloud burst happening above the village with properties being lost (probably mid-1800s).

Although historic sources mention two or more polos, only one variety is known for sure to have survived to our days: the polo natural.

The garden is based on manuscripts and other historic sources.

This landscape is a historic source of modern American views of conservation and the environment.

While identifying the Gaddang as a distinct group, historic sources have done a poor job of ethnography.

He continued his quest into history, seeking ways to report and preserve historic sources.

The Johannis "is not only a valuable historic source but a work of marked poetic merit."

A legend dates its construction to the year 1422; however, in historic sources it is first mentioned in 1517.

It is not apparent from historic sources how long he stayed there.