THE IBIS VOLUME 130
No author. Stock no 575693. Published by British Ornithologists' union. 1988.

THE IBIS VOLUME 123
No author. Stock no 575694. Published by British Ornithologists' union. 1981.

THE IBIS VOLUME 126
No author. Stock no 575691. Published by British Ornithologists' union. 1984.

THE IBIS VOLUME 131
No author. Stock no 575697. Published by British Ornithologists' union. 1989.

THE IBIS VOLUME 128
No author. Stock no 575696. Published by British Ornithologists' union. 1986.

THE IBIS VOLUME 129
No author. Stock no 575692. Published by British Ornithologists' union. 1987.

THE IBIS VOLUME 120
No author. Stock no 575449. Published by British Ornithologists' union. 1978.

THE IBIS VOLUME 118
No author. Stock no 575451. Published by British Ornithologists' union. 1976.

THE IBIS VOLUME 117
No author. Stock no 575462. Published by British Ornithologists' union. 1975.

THE IBIS VOLUME 102
No author. Stock no 575445. Published by British Ornithologists' union. 1960.

THE IBIS VOLUME 104
No author. Stock no 575444. Published by British Ornithologists' union. 1962.

THE IBIS VOLUME 112
No author. Stock no 575459. Published by British Ornithologists' union. 1970.