@book{der+versteifte+bogenbalkentraeger+d+r+p+298738,
    author = {Thieme, Johs},
    title = {Der versteifte Bogenbalkenträger (D.R.P. 298738)},
    address = {Heidelberg},
    publisher = {Universitats Buchdruckerei J. Horning},
    date = {1918}
}