Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 4-13

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 44-47

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 47-50

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 50-55

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 55-61

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 61-66

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 66-68

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 68-73

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 76-80

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 80-83

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 84-89

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 93-96

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 96-102

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 102-115

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 115-122

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 118-122

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 123-131

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 137-141

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 141-143

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 143-147

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 147-149

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 149-150

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 151-154

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 155-158

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 170-172

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 172

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 173-175

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 175-178

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 178-185

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 189-194

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 194-195

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 196-201

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 201-202

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 203-204

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 205-206

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 208-212

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 213-215

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 219-223

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 230-232

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 232-233

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 233-235

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 235-237

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 238

Published in Bulletin of the British Ornithologists' Club, in 1980, in volume 100, issue 2, pages 164-170

Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, issue 4, pages 226-230