Geologie von West-Ibiza (Balearen) 
By: door Ewald Thomas Nicolaas Spiker ...
Published: 1935
Place of publication: [Utrecht
Language: swe
Number of pages: 63
Subjects: Geology -- Spain -- Balearic Islands.
Notes: Proefschrift - Utrecht.
"Stellingen" inserted.
"Literaturverzeichnis": p. 5-8.