Universal grammar in child second language acquisition : null subjects and morphological uniformity 2026-02-15T09:23:35+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Lakshmanan, Usha (Language acquisition & language disorders, 1994)