The collection of Black /Brown Glaze

The black,brown and teadust glaze was once famous during Sung period and mainly produced by kiln located at Shandong, Hebei, Henan, Shanxi, and Shaanxi provinces.

Best reference is available at Paragon Book store or :

Hare’s Fur, Tortoiseshell, and Partridge Feather
Chinese brown and black glazed ceramics, 400-1400 by Robert D. Mowry