Published in Malacologia, in 1980, in volume 19, pages 249-278
Published in Malacologia, in 1980, in volume 19, pages 297-328
Published in Malacologia, in 1980, in volume 20, pages 1-33
Published in Malacologia, in 1980, in volume 20, pages 161-194
Published in Malacologia, in 1980, in volume 20, issue 1, pages 143-151