The diversity of sources will be apparent and it should be pointed out in this regard that two a priori similar sources may produce widely differing data for the measurement of international migration flows and stocks of migrants.
- دخول طالبي اللجوء (وهي حالات يعسر فيها التمييز بين ما يتعلق منها بالدخول القصير الأجل والدخول الطويل الأجل)