Person Klaus-Gerhard (with contributions from) HellerKlaus-Gerhard (with contributions from) Heller bei Schweizerbart'sche, E.letzte lieferbare Neuerscheinung: A Field Guide to the Bushcrickets, Wetas and Raspy Crickets of Tanzania and Kenya Claudia HempSchweizerbart'sche, E.Hardcover2021 A Field Guide to the Bushcrickets, Wetas and Raspy Crickets of Tanzania and Kenya Claudia HempSchweizerbart'sche, E.Hardcover2021