1931-1934 Treaarsekspeditionen til Christian x's Land

The vascular plants of northeast Greenland from 74 ̊30' to 79 ̊00' N. Lat. and a summary of all species found in east Greenland / by Gunnar Seidenfaden and Thorv. Sørensen, with 60 figures in the text and 4 plates

The vascular plants of east Greenland from 710̊0' to 733̊0' N. lat