@book{UBHD-1757717, author={Westrich, Paul}, title={Die Wildbienen Baden-W{\"u}rttembergs}, publisher={Ulmer}, address={Stuttgart}, year={1989-1990}, language={ger}, isbn={3-8001-3307-5 and 978-3-8001-3307-9}, keywords={Baden-W{\"u}rttemberg / Bienen <{\"U}berfamilie>}, library={UB}, }