细节
Johannes Geradus Keulemans (1842-1912)
Blackcap
signed 'J G Keulemans'; pencil and watercolour
6 x 7in.
Blackcap
signed 'J G Keulemans'; pencil and watercolour
6 x 7in.
出版
Lord Lilford, Coloured Figures of the Birds of the British Islands, III, pl. 28