The best two books I know of about bumbles is "Bumblebee Econcomics", by
Heinrich (technical) and "Humblebee Bumblbee", by Griffin (for the
layman).  Both have chapters on catching/keeping bumblebees.

Construction of a nesting box can be found at
http://www.anet-chi.com/%7Emanytimes/page40.htm

Cheers,
Dave Pehling
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