diff --git a/CHANGELOG.md b/CHANGELOG.md
index edff9bd..f766a4b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,5 @@
 # Changelog
 
 ## 0.0.1
-- `DataFrame`: `DataFrame` entity with basic functionality added
\ No newline at end of file
+- `DataFrame`: `DataFrame` entity with basic functionality added
+- `Series`: `Series` class added - the entity that is representing a column with its header
diff --git a/lib/ml_dataframe.dart b/lib/ml_dataframe.dart
index 97f766f..7282a70 100644
--- a/lib/ml_dataframe.dart
+++ b/lib/ml_dataframe.dart
@@ -1,4 +1,3 @@
 export 'package:ml_dataframe/src/data_frame/data_frame.dart';
 export 'package:ml_dataframe/src/data_frame/factories/from_csv.dart';
-export 'package:ml_dataframe/src/data_frame/series.dart';
-export 'package:ml_dataframe/src/data_reader/data_reader.dart';
\ No newline at end of file
+export 'package:ml_dataframe/src/data_frame/series.dart';
\ No newline at end of file
diff --git a/test/data_frame/factories/fake_data_headless.csv b/test/data_frame/factories/fake_data_headless.csv
new file mode 100644
index 0000000..c0abc8c
--- /dev/null
+++ b/test/data_frame/factories/fake_data_headless.csv
@@ -0,0 +1,7 @@
+value_1_1,value_2_7,value_3_3,1
+value_1_2,value_2_2,value_3_2,10
+value_1_3,value_2_3,value_3_1,200
+value_1_2,value_2_4,value_3_3,300
+value_1_2,value_2_5,value_3_1,400
+value_1_1,value_2_6,value_3_2,500
+value_1_3,value_2_7,value_3_1,700