Walter de Gruyter GmbH, 1903

Walter de Gruyter GmbH, 1905

Walter de Gruyter GmbH, 1905

Walter de Gruyter GmbH, 1903

Walter de Gruyter GmbH, 1901

Oxford University Press (OUP), 1898

Oxford University Press (OUP), 1899

Oxford University Press (OUP), 1898

Oxford University Press (OUP), 1897

Oxford University Press (OUP), 1897

Oxford University Press (OUP), 1896

Oxford University Press (OUP), 1897

Oxford University Press (OUP), 1897

Walter de Gruyter GmbH, 1897

Oxford University Press (OUP), 1897

Oxford University Press (OUP), 1895

Oxford University Press (OUP), 1897

Informa UK Limited, 2010

BMJ, 1984

Wiley, 1984