Research
The effect of snow-storm on breeding birds.
Ash, J.S. 1951. British Birds, 44: 57-59.
Colour variation in tits
Ash, J.S. 1951. British Birds, 44: 92-93.
Blue Tits killed in mouse-traps
Ash, J.S. 1951. British Birds, 44: (184).
Domed nest of wood-lark
Ash, J.S. 1951. British Birds, 44: 201.
"False-feeding" of passerines
Ash, J.S. 1951. British Birds, 44: 406-407.