Published in Carnivorous plant newsletter, in 1973, in volume 2, issue 1, pages 5-6

Published in Carnivorous plant newsletter, in 1973, in volume 2, issue 1, pages 6-9

Published in Carnivorous plant newsletter, in 1973, in volume 2, issue 1, pages 10-11

Published in Carnivorous plant newsletter, in 1973, in volume 2, issue 1, pages 11-12

Published in Carnivorous plant newsletter, in 1973, in volume 2, issue 2, pages 23-25

Published in Carnivorous plant newsletter, in 1973, in volume 2, issue 2, pages 25-27

Published in Carnivorous plant newsletter, in 1973, in volume 2, issue 2, pages 28-29

Published in Carnivorous plant newsletter, in 1973, in volume 2, issue 3, pages 35-37

Published in Carnivorous plant newsletter, in 1973, in volume 2, issue 3, pages 37-39

Published in Carnivorous plant newsletter, in 1973, in volume 2, issue 3, pages 41-43

Published in Carnivorous plant newsletter, in 1973, in volume 2, issue 3, pages 44-46

Published in Carnivorous plant newsletter, in 1973, in volume 2, issue 3, pages 49-52

Published in Carnivorous plant newsletter, in 1973, in volume 2, issue 4, pages 61-62

Published in Carnivorous plant newsletter, in 1973, in volume 2, issue 4, pages 63-65

Published in Carnivorous plant newsletter, in 1973, in volume 2, issue 4, pages 70-71

Published in Carnivorous plant newsletter, in 1973, in volume 2, issue 4, pages 72-74

Published in Carnivorous plant newsletter, in 1973, in volume 2, issue 4, pages 66-69