Gaya APA
Laufeld, S. (1974).
Reference Localities for Paleontology and Geology in the Silurian of Gotland .
Lund:
Sveriges Geologisja Undersokning.
Gaya MLA
Laufeld, Sven.
"Reference Localities for Paleontology and Geology in the Silurian of Gotland".
Lund:
Sveriges Geologisja Undersokning,
1974.
Text.