For Teachers:
Denise E. Murray, MaryAnn Christison: What English Language Teachers Need to Know Volume I
Denise E. Murray, MaryAnn Christison: What English Language Teachers Need to Know Volume II
For Students:
(http://linguist87.blogfa.com/cat-38.aspx ) منبع: وبلاگ زبان شناسی
http://static.ddmcdn.com/gif/alfalfa-herbal-remedies-1.jpg
Alfalfa contains substances such as isoflavones and coumestans, which bind to estrogen receptors in the body. Estrogen binds to these receptors like a key in a lock. If the estrogen level is low and many of these "locks" are empty, the constituents of alfalfa -- which resemble estrogen "keys" -- bind to them instead and increase estrogenic activity.