The library has several books on Hmong culture:
Culture and customs of the Hmong DS 509.5.H66 L44 2010
The Hmong: An introduction to their history and culture DS 509.5.H66 H66 2004
The Hmong, yesterday and today DS 509.5.H66 M66 1987
The Hmong (Ch. 4 Shamans in the Hmong American community) E 184 .H55 H55 2007
A free people: Tracing our Hmong roots E184.H55 F74 2003 [Sturgeon Bay]
You can also search for articles using the EBSCO Articles database.
Type in searches such as:
hmong and shaman
hmong and funeral
There are dozens of articles!