| Citation | Hedd, A., J.L. Ryder, L.L. Cowen and D.F. Bertram, 2002 Inter-annual variation in the diet, provisioning and growth of Cassin's auklet at Triangle Island, British Columbia: responses to variation in ocean climate. Mar. Ecol. Prog. Ser. 229:221-232. | 
| Ref. | 4392 Hedd, A., J.L. Ryder, L.L. Cowen and D.F. Bertram, 2002 | 
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| Named Used as Valid | Ptychoramphus aleuticus | 
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