Published in Nautilis, in 1938, in volume 51, pages 73-79

Published in Nautilis, in 1938, in volume 51, pages 79-85

Published in The Nautilus, in 1938, in volume 51, pages 85-88

Published in Nautilis, in 1938, in volume 51, pages 88-91

Published in Nautilis, in 1938, in volume 51, pages 91-97

Published in Nautilis, in 1938, in volume 51, pages 97-99

Published in Nautilis, in 1938, in volume 51, pages 100-104

Published in Nautilis, in 1938, in volume 51, pages 109-114

Published in Nautilis, in 1938, in volume 51, pages 115-118

Published in Nautilis, in 1938, in volume 51, pages 118-119

Published in Nautilis, in 1938, in volume 51, pages 119-122

Published in Nautilis, in 1938, in volume 51, pages 122-126

Published in Nautilis, in 1938, in volume 51, pages 126-131

Published in Nautilis, in 1938, in volume 51, pages 132-134

Published in Nautilis, in 1938, in volume 51, pages 134-135

Published in Nautilis, in 1938, in volume 51, pages 135-137

Published in Nautilis, in 1938, in volume 51, pages 137-140

Published in Nautilis, in 1938, in volume 51, pages 140-141

Published in Nautilis, in 1938, in volume 51, pages 142-143

Published in Nautilis, in 1938, in volume 52, pages 1-4

Published in Nautilis, in 1938, in volume 52, pages 5-7

Published in Nautilis, in 1938, in volume 52, pages 7-9

Published in Nautilis, in 1938, in volume 52, pages 10-11

Published in Nautilis, in 1938, in volume 52, pages 11-14

Published in Nautilis, in 1938, in volume 52, pages 15-16

Published in Nautilis, in 1938, in volume 52, pages 16-20

Published in Nautilis, in 1938, in volume 52, pages 21-22

Published in Nautilis, in 1938, in volume 52, pages 22-24

Published in Nautilis, in 1938, in volume 52, pages 24-25

Published in Nautilis, in 1938, in volume 52, pages 25-26

Published in Nautilis, in 1938, in volume 52, pages 26-27

Published in Nautilis, in 1938, in volume 52, pages 27-29

Published in Nautilis, in 1938, in volume 52, pages 29-30

Published in Nautilis, in 1938, in volume 52, pages 30-32

Published in Nautilis, in 1938, in volume 52, pages 37-38

Published in Nautilis, in 1938, in volume 52, pages 46-48

Published in Nautilis, in 1938, in volume 52, pages 48-49

Published in Nautilus Philadelphia, in 1938, in volume 52, pages 49-51

Published in Nautilis, in 1938, in volume 52, pages 51-54

Published in Nautilis, in 1938, in volume 52, pages 54-55

Published in Nautilis, in 1938, in volume 52, pages 56-59

Published in Nautilis, in 1938, in volume 52, pages 60-62

Published in Nautilis, in 1938, in volume 52, pages 62-63

Published in Nautilis, in 1938, in volume 52, pages 66-72

Published in Nautilus, in 1938, in volume 52, issue 1, pages 33