diff --git a/describe.py b/describe.py
index b9cc3a3..1989616 100755
--- a/describe.py
+++ b/describe.py
@@ -9,5 +9,6 @@ if __name__ == '__main__':
     recipe_root = os.path.join(root, 'data', 'recipes')
     cookbook = satisfactory.Cookbook(recipe_root)
 
-    print(i for i in cookbook.resources())
+    for i in cookbook.resources():
+        print(i)
 
diff --git a/satisfactory/__init__.py b/satisfactory/__init__.py
index f5a4abc..348ccf1 100644
--- a/satisfactory/__init__.py
+++ b/satisfactory/__init__.py
@@ -26,19 +26,11 @@ class Cookbook(object):
     def is_component(self, name):
         return 'component' in self.__recipes[name]['type']
 
-    def is_resource(self, name):
-        return ''
-
     def components(self):
-        found = set()
+        return (i for i in self.all() if self.is_component(i))
 
-        for _, descriptor in self.__recipes.items():
-            for variation in descriptor['recipes']:
-                for need, _ in variation['input'].items():
-                    if need in found:
-                        continue
-                    found.add(need)
-                    if not self.is_component(need):
-                        continue
-                    yield need
+    def is_resource(self, name):
+        return 'resource' in self.__recipes[name]['type']
 
+    def resources(self):
+        return (i for i in self.all() if self.is_resource(i))