Pyenson, Nicholas D The dilemma of trade samples and the importance of museum vouchers--caveats from a study on the extinction of Steller's sea cow: a comment on Crerar et al. (2014). [electronic resource] - Biology letters Feb 2016 - 20150149 p. digital Publication Type: Journal Article; Comment ISSN: 1744-957X Standard No.: 10.1098/rsbl.2015.0149 doi Subjects--Topical Terms: AnimalsExtinction, BiologicalSirenia--physiology