diff --git a/check_dtypes.py b/check_dtypes.py
index 946c5fe..5925b48 100644
--- a/check_dtypes.py
+++ b/check_dtypes.py
@@ -10,6 +10,7 @@ with warnings.catch_warnings():
 
 
 mods_info = pd.read_parquet("mods_info_df.parquet")
+page_info = pd.read_parquet("page_info_df.parquet")
 alto_info = pd.read_parquet("alto_info_df.parquet")
 
 # Check
@@ -37,6 +38,11 @@ EXPECTED_TYPES = {
         r"language_.*Term": ("object", ["str", "NoneType"]),
         r"classification-.*": ("object", ["str", "NoneType"]),
 
+        # page_info
+
+        r"fileGrp_.*_file_FLocat_href": ("object", ["str", "NoneType"]),
+        r"structMap-LOGICAL_TYPE_.*": ("boolean", None),
+
         # alto_info
 
         r"Description_.*": ("object", ["str", "NoneType"]),
@@ -49,6 +55,7 @@ EXPECTED_TYPES = {
 
         r"Layout_Page_(WIDTH|HEIGHT)": ("Int64", None),
 }
+
 def expected_types(c):
     for r, types in EXPECTED_TYPES.items():
         if re.fullmatch(r, c):
@@ -65,7 +72,7 @@ def check_types(df):
         edt, einner_types = expected_types(c)
 
         if edt is None:
-            print(f"No expected dtype known for column {c}")
+            print(f"No expected dtype known for column {c} (got {dt})")
         elif dt != edt:
             print(f"Unexpected dtype {dt} for column {c} (expected {edt})")
 
@@ -75,5 +82,6 @@ def check_types(df):
                 print(f"Unexpected inner types {inner_types} for column {c} (expected {einner_types})")
 
 check_types(mods_info)
+check_types(page_info)
 check_types(alto_info)
 
diff --git a/src/mods4pandas/lib.py b/src/mods4pandas/lib.py
index ab01fce..a0646fb 100644
--- a/src/mods4pandas/lib.py
+++ b/src/mods4pandas/lib.py
@@ -378,10 +378,12 @@ def convert_db_to_parquet(con, table, index_col, output_file):
             df[c] = df[c].astype("Int64")
         elif column_type == "float64":
             df[c] = df[c].astype("Float64")
+        elif column_type == "bool":
+            df[c] = df[c].map({"True": True, "False": False}).astype("boolean")
         elif column_type == "set":
             # TODO WIP
             continue
         else:
-            raise NotImplementedError(f"Column type {column_type} not implemented yet.")
+            raise NotImplementedError(f"Column {c}: type {column_type} not implemented yet.")
 
     df.to_parquet(output_file)
\ No newline at end of file
diff --git a/src/mods4pandas/mods4pandas.py b/src/mods4pandas/mods4pandas.py
index 2d80c33..7d45b47 100755
--- a/src/mods4pandas/mods4pandas.py
+++ b/src/mods4pandas/mods4pandas.py
@@ -327,6 +327,8 @@ def pages_to_dict(mets, raise_errors=True) -> List[Dict]:
             assert file_ is not None
             fileGrp_USE = file_.getparent().attrib.get("USE")
             file_FLocat_href = (file_.xpath('mets:FLocat/@xlink:href', namespaces=ns) or [None])[0]
+            if file_FLocat_href is not None:
+                file_FLocat_href = str(file_FLocat_href)
             page_dict[f"fileGrp_{fileGrp_USE}_file_FLocat_href"] = file_FLocat_href
 
         def get_struct_log(*, to_phys):
@@ -368,7 +370,7 @@ def pages_to_dict(mets, raise_errors=True) -> List[Dict]:
         for struct_div in struct_divs:
             type_ = struct_div.attrib.get("TYPE").lower()
             assert type_
-            page_dict[f"structMap-LOGICAL_TYPE_{type_}"] = 1
+            page_dict[f"structMap-LOGICAL_TYPE_{type_}"] = True
 
         result.append(page_dict)