Published in Breviora, in 1975, in volume 430, pages 1-9

Published in Breviora, in 1975, in volume 431, pages 1-8

Published in Breviora, in 1975, in volume 432, pages 1-24

Published in Breviora, in 1975, in volume 433, pages 1-10

Published in Breviora, in 1975, in volume 434, pages 1-8