@book{die+baukunst+des+schulhauses+1+das+schulhaus,
    author = {Vetterlein, Ernst Friedrich},
    title = {Die Baukunst des Schulhauses. 1, Das Schulhaus},
    address = {Leipzig},
    publisher = {G. J. Göschen'sche Verlagshandlung},
    date = {1909}
}