@book{the+world+039+s+columbian+water+commerce+congress+chicago+1893+chain+towage+with+magnetic+adherence,
    author = {Molinos, Leon i Bovet, Armand de},
    title = {The World's Columbian Water Commerce Congress, Chicago, 1893 : Chain towage with magnetic adherence},
    address = {Boston},
    publisher = {Damrell & Upham},
    date = {1893}
}