Published in Carnivorous plant newsletter, in 1972, in volume 1, issue 1, pages 5-6

Published in Carnivorous plant newsletter, in 1972, in volume 1, issue 1, pages 8-9

Published in Carnivorous plant newsletter, in 1972, in volume 1, issue 1, pages 9-15

Published in Carnivorous plant newsletter, in 1972, in volume 1, issue 2, pages 26-27

Published in Carnivorous plant newsletter, in 1972, in volume 1, issue 2, pages 27-28

Published in Carnivorous plant newsletter, in 1972, in volume 1, issue 2, pages 29-33

Published in Carnivorous plant newsletter, in 1972, in volume 1, issue 3, pages 41-45

Published in Carnivorous plant newsletter, in 1972, in volume 1, issue 3, pages 45-47

Published in Carnivorous plant newsletter, in 1972, in volume 1, issue 3, pages 48-50

Published in Carnivorous plant newsletter, in 1972, in volume 1, issue 4, pages 59-61

Published in Carnivorous plant newsletter, in 1972, in volume 1, issue 4, pages 61-62

Published in Carnivorous plant newsletter, in 1972, in volume 1, issue 4, pages 62-63

Published in Carnivorous plant newsletter, in 1972, in volume 1, issue 4, pages 63-66