Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 6-9

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 9-12

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 12-15

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 15-20

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 20-21

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 21-24

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 24-26

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 27-28

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 29-30

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 30-32

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 33-36

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 36-38

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 39-40

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 42-44

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 45-47

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 47-54

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 54-56

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 56-57

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 57-59

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 59-61

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 66-68

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 68-71

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 71-72

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 72-75

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 75-77

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 77-80

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 80-81

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 81-82

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 83-86

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 86-94

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 94-98

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 98-102

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 102-105

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 105-108

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 108-110

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 110-111

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 112-113

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 114

Published in Bulletin of The British Ornithologists' Club, in 1979, in volume 99, pages 156

Published in Bulletin of the British Ornithologists' Club, in 1979, in volume 99, issue 4, pages 142-143