@Book{Schulz1903,
author  = "Schulz, W. A.",
title   = "Materialien zu einer Hymenopterenfauna der westindischen Inseln",
year    = "1903",
address = "München",
series  = "Sitzungsberichte",
volume  = "1903,18",
url     = "https://publikationen.badw.de/en/003394484",
}