Second language acquisition and the critical period hypothesis. Birdsong, D., editor Lawrence Erlbaum, Mahwah, NJ.
bibtex   
@book{birdsong_second_1999,
	Address = {Mahwah, NJ},
	Date = {1999},
	Date-Modified = {2016-09-22 20:24:45 +0000},
	Editor = {Birdsong, David},
	Keywords = {L2, linguistics},
	Publisher = {Lawrence Erlbaum},
	Title = {Second language acquisition and the critical period hypothesis}}
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