@misc{l+039+astronomie+nautique+au+portugal+a+l+039+epoque+des+grandes+decouvertes,
    author = {Bensaúde, Joaquim},
    title = {L'astronomie nautique au Portugal à l'epoque des grandes decouvertes},
    address = {Bern},
    publisher = {Akademische Buchhandlung von Max Drechsel},
    date = {1912}
}