Published in Bull Brit Ornithol Club, in 1967, in volume 87, pages 17-23

Published in Bull Brit Ornithol Club, in 1967, in volume 87, pages 23-24

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 136-137

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 2-5

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 5-10

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 10-13

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 33-34

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 34-35

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 35-36

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 38-39

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 40-41

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 41-42

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 45-48

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 49-56

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 60-61

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 61

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 62-63

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 63

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 73

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 78-81

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 81-86

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 86-89

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 89-90

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 92

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 95-96

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 97-100

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 100-101

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 101-102

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 111

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 114-117

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 117-120

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 122-123

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 125-126

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 127-128

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 137-141

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 141-142

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 142-148

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 149-150

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 153-157

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 157-164

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 164-165

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 167-168

Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 168

Published in Bulletin of the British Ornithologists' Club, in 1967, in volume 87, issue 8, pages 129-135