diff --git a/docs/api.rst b/docs/api.rst
index 396647d..8f6e51b 100644
--- a/docs/api.rst
+++ b/docs/api.rst
@@ -11,8 +11,8 @@ Votelib API reference
    
    api_docs/api_evaluate
    api_docs/api_convert
+   api_docs/api_measure
    api_docs/api_candidate
    api_docs/api_vote
    api_docs/api_component
-
-
+   api_docs/api_persist
diff --git a/docs/api_docs/api_measure.rst b/docs/api_docs/api_measure.rst
new file mode 100644
index 0000000..223be20
--- /dev/null
+++ b/docs/api_docs/api_measure.rst
@@ -0,0 +1,5 @@
+Election result measurements
+---------------------------------------------------------
+
+.. automodule:: votelib.measure
+   :members:
diff --git a/docs/api_docs/api_persist.rst b/docs/api_docs/api_persist.rst
new file mode 100644
index 0000000..9f085c2
--- /dev/null
+++ b/docs/api_docs/api_persist.rst
@@ -0,0 +1,6 @@
+Persistence of election evaluators and other objects
+---------------------------------------------------------
+
+.. autofunction:: votelib.persist.from_dict
+
+.. autofunction:: votelib.persist.to_dict
diff --git a/votelib/persist.py b/votelib/persist.py
index 53f6f88..29af170 100644
--- a/votelib/persist.py
+++ b/votelib/persist.py
@@ -18,6 +18,8 @@ def simple_serialization(class_: type) -> type:
     to the class's constructor parameter names. Therefore, this decorator
     is only useful when the class stores all its original parameters
     unchanged (or in any other form acceptable to its constructor).
+
+    :param class_: The class to add the method to.
     '''
     if hasattr(class_, 'serialize_params'):
         param_names = class_.serialize_params
@@ -135,6 +137,10 @@ def get_object(identifier: str) -> Any:
 
 
 def from_dict(value: Dict[str, Any]) -> Any:
+    """Parse an election evaluator object from a JSON-like dictionary.
+
+    :param value: A dictionary created by :func:`to_dict`.
+    """
     if not isinstance(value, dict):
         raise ValueError('invalid votelib object def: dict expected,'
                          f'got {value!r}')
@@ -148,6 +154,13 @@ def from_dict(value: Dict[str, Any]) -> Any:
 
 
 def to_dict(obj: Any) -> Dict[str, Any]:
+    """Serialize an election evaluator object to a JSON-ready dictionary.
+
+    :param obj: An election evaluator object or similar. It should provide
+        a `to_dict()` method (all the standard evaluators, converters and the
+        like from Votelib should have it, courtesy of the simple_serialization
+        decorator).
+    """
     return serialize_value(obj)