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 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