@mastersthesis {,
	title = {Early Peruvian Peasants: The Culture History of a Central Highlands Valley},
	volume = {Ph.D.},
	year = {1970},
	note = {I asked Browman about the mirror fragment in his excavations"A fragment of an obsidian mirror (not illustrated), presumably circular, ground and polished to 0.4 cm. thickness, was found in a single phase occupation Calpish site.  The fragment was too small to measure the diameter, but the curvature indicated that the mirror should have been circular."Calpish was my MH 1-2 phase, where I had a C-14 date of A.D. 550 (uncorrected)"},
	pages = {578},
	school = {Harvard University},
	type = {Unpublished Ph.D. Dissertation},
	address = {Cambridge, MA},
	author = {Browman, David L.}
}