What does Buch stand for?

Buchanan's Cape Of Good Hope Reports - A publication (DLA)

Buchanan's Court of Session - 1800-13 - Scotland - A publication (DLA)

Buchanan's New Jersey Equity Reports - A publication (DLA)

Buchanan's Supreme Court Reports - Cape Colony - A publication (DLA)

Buchenau - Botanist in plant scientific name (HUH)

Board Update Command History (VLIE)