@book {4863, title = {Lelya - ᚢapra: Les offices chald{\'e}ens de la nuit et du matin}, series = {Orientalia Christiana Analecta}, volume = {156}, year = {1959}, publisher = {Pontifical Institute of Oriental Studies}, organization = {Pontifical Institute of Oriental Studies}, address = {Rome}, keywords = {Liturgy}, author = {Juan Mateos} }