32. What does it mean to know a word?
An Introduction to Second Language Vocabulary
http://www.press.umich.edu/pdf/0472030299-intro.pdf
Vocabulary in Language Teaching by Norbert Schmitt
http://catdir.loc.gov/catdir/samples/cam032/99057110.pdf
Vocabulary Acquisition; The research and its pedagogical implications
byPeter Duppenthaler
http://www.lib.tezuka-
gu.ac.jp/kiyo/rTEZUKAYAMAGAKUINUNI/r42PDF/r42Duppenthaler.pdf