PERRINS CM (1995) Dutch Ornithological Union: Hole Brothers Theme Day: influences of the diversity of habitat on the breeding biology of tits. Factors affects the timing of laying in Great. LIMOSA 68 (4): 174-174.

Dutch Ornithological Union: Hole Brothers Theme Day: influences of the diversity of habitat on the breeding biology of tits. Factors affects the timing of laying in Great tits

[free pdf] [dutch summary]