Budgerigar matings and colour expectations, containing H. Dunkers' oriiginal tables.
Contributors: Duncker, Hans, 1881-1961.
Edition: 5th edition edited by F. S. Elliott and E. W. Brooks.
Publisher: Derby
Published: 1948
Place of publication: Chaddesden
Language: eng
Number of pages: 179
Subjects: Budgerigar.; Birds -- Color.