A bot more robust csv parsing

arkindex/documents/surface.py

@@ -142,7 +142,11 @@ class SurfaceImporter(object):
         with open(self.csvpath) as csvfile:
             reader = csv.reader(csvfile, delimiter=';')
             next(reader)  # Skip header
-            self.csvdata = [CSVRow._make(row[:3]) for row in reader if len(row[0]) > 0]
+            self.csvdata = [
+                CSVRow(*row[:3])
+                for row in reader
+                if row and len(row[0]) > 0
+            ]
 
         self.raw_volume_names = set(row.volume_name for row in self.csvdata)
         self.raw_folios = set((row.volume_name, row.folio) for row in self.csvdata)