Hemoglobin concentrations and blood gas tensions of free-diving Weddell seals. - Qvist,J.; Hill,R.D.; Schneider,R.C.; Falke,K.J.; Liggins,G.C.; Guppy,M.; Elliot,R.L.; Hochachka,P.W.; Zapol,W.M. (J Appl Physiol, 1986)