In anthropological usage, ethnography is a genre of writing that describes a particular cultural group based on in-depth first hand observations, interviews and participation. Ethnographies can be found in reference works, edited volumes and journals, but the typical format is as an ethnographic monograph, which is a single book written by one person focusing on a particular population, place and time, and offering a holistic portrait of a single cultural group. The word "ethnography" comes from the Greek ethnos = folk/people and graphein = writing. Other disciplines may use the word differently.
Ethnographies can be tricky to find and identify because there is no specific subject heading (or LCSH) for "ethnography". There is no one section or simple search for ethnographies, because books in the library are organized by the region or people being described, not the genre of writing. So, here are some tips for searching for them in the library catalog
Women anthropologists : a biographical dictionary
Biographical dictionary of social and cultural anthropology
International dictionary of anthropologists