Morgans, H., & Morgans, H. S. (1997). Early to middle Jurassic stratigraphic development, vegetation and climate change in north-western Europe.
Chicago-čujuhus (17. p.)Morgans, H., juo Helen Sarah Morgans. Early to Middle Jurassic Stratigraphic Development, Vegetation and Climate Change in North-western Europe. 1997.
MLA-čujuhus (9. p.)Morgans, H., juo Helen Sarah Morgans. Early to Middle Jurassic Stratigraphic Development, Vegetation and Climate Change in North-western Europe. 1997.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.