Observations on the seals of the (Welsh) dee estuary

• Main Authors: Craggs, J. D., Ellison, N. F.
• Format: Text
• Language: English
• Published: Wiley-Blackwell 1960
• Subjects: Halichoerus grypus; Phoca vitulina; Seal; Dee
• Online Access: https://rcin.org.pl/dlibra/publication/edition/37190/content