be poorly documented

The early architectural history of the building is poorly documented.

What then happened to the building is poorly documented.

The last years of her life are poorly documented.

Before the 14th century Finnish history is very poorly documented.

Mather's life through most of the 1870s is poorly documented.

In the 1530s he may have attended university, but this portion of his life is poorly documented.

Unfortunately, the rest of the band's history (up through the 1990s and beyond) is poorly documented.

The next several years of his life are poorly documented, and little can be ascertained.

Details on the W73 are poorly documented, and it never entered production or service.

While poorly documented, chemical communication is believed to be important to the group.