Published in Carnivorous plant newsletter, in 1975, in volume 4, issue 1, pages 8-18

Published in Carnivorous plant newsletter, in 1975, in volume 4, issue 1, pages 19-20

Published in Carnivorous plant newsletter, in 1975, in volume 4, issue 2, pages 30-31

Published in Carnivorous plant newsletter, in 1975, in volume 4, issue 2, pages 33-34

Published in Carnivorous plant newsletter, in 1975, in volume 4, issue 2, pages 35-37

Published in Carnivorous plant newsletter, in 1975, in volume 4, issue 3, pages 43-44

Published in Carnivorous plant newsletter, in 1975, in volume 4, issue 3, pages 46-47

Published in Carnivorous plant newsletter, in 1975, in volume 4, issue 3, pages 47-48

Published in Carnivorous plant newsletter, in 1975, in volume 4, issue 3, pages 49-50

Published in Carnivorous plant newsletter, in 1975, in volume 4, issue 4, pages 58-60

Published in Carnivorous plant newsletter, in 1975, in volume 4, issue 4, pages 60-63

Published in Carnivorous plant newsletter, in 1975, in volume 4, issue 4, pages 63-64

Published in Carnivorous plant newsletter, in 1975, in volume 4, issue 4, pages 64-65

Published in Carnivorous plant newsletter, in 1975, in volume 4, issue 4, pages 66-67

Published in Carnivorous plant newsletter, in 1975, in volume 4, issue 4, pages 68-69

Published in Carnivorous plant newsletter, in 1975, in volume 4, issue 4, pages 69-70