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1
by Ashworth, J. M.
Published 1973
Springer Netherlands
“... it reveals a grey, crescent shaped area on pay more than a cursory obeisance to their the side of the egg...”
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2
by Manly, Bryan
Published 1990
Springer Netherlands
Table of Contents: “...8.6 The grey pup seal Halichoerus grypus -- References -- Author index...”