diff --git a/src/MDConcMarkingPosition.php b/src/MDConcMarkingPosition.php
index 18e90fe..529eccb 100644
--- a/src/MDConcMarkingPosition.php
+++ b/src/MDConcMarkingPosition.php
@@ -104,6 +104,8 @@ final class MDConcMarkingPosition implements MDImporterConcordanceListInterface
         "RS" => "rear_side",
         "rs" => "rear_side",
         "Recto" => "rear_side",
+        "Revers" => "rear_side",
+        "Reverse" => "rear_side",
         "rs Umschrift" => "rear_side",
         "Rückseite der Leinwand" => "rear_side",
         "Rückseitig auf ovalem Keilrahmen oben links und rechts" => "rear_side",