SPENCER, Robert
Report on bird-ringing for 1973 / by Robert Spencer and Robert Hudson. -- Hertfordshire : British Trust for Ornithology, 1975 - 64 p.
Supl. especial de Bird Study. Vol. 22 (1975)
Aves - Informe de anillamiento
598.2:57.082.13(410)(047)
Report on bird-ringing for 1973 / by Robert Spencer and Robert Hudson. -- Hertfordshire : British Trust for Ornithology, 1975 - 64 p.
Supl. especial de Bird Study. Vol. 22 (1975)
Aves - Informe de anillamiento
598.2:57.082.13(410)(047)