http://www.fetal-exposure.org/VITA.html

http://www.iom.edu/?id=12703

http://www.ithyroid.com/vitamin_a.htm

http://www.nap.edu/catalog/10026.html

http://www.nationalnutrition.ca/

http://www.naturaleyecare.com/store/detail.aspx?ID=1554

http://www.nature.com/emboj/journal/v18/n17/fig_tab/7591875t1.html

http://www.nutristrategy.com/nutrition/vitamina.htm

http://www.nutritiondata.com/foods-000098000000000000000.html

http://www.obesityresearch.org/cgi/content/abstract/14/1/52

http://www.recipestoday.com/resources/vitaminquiz/index.htm

http://www.skincare-md.com/index.cfm?event=ProdDisplay&CategoryID=28

http://www.vitaminmanual.com/vitamin_a.htm

http://na.link.decdna.net/n/11680/11682/www.wdrake.com/da575502002503000000000400005615126915950000000000000000000000000000000100/i/c?0&pq=/walterdrake/Shopping/ProductDetail.aspx?ProductID=1021677&SourceCode=15070300&Affid=4

http://www.3dchem.com/molecules.asp?ID=61

http://www.amerimark.com/cgi-bin/amerimark/cat_item.html?prod=12839

http://www.amerimark.com/cgi-bin/amerimark/cat_item.html?prod=12839&media=G02095&days=XVQ

http://www.nutraingredients-usa.com/news/ng.asp?n=70826-syngenta-beta-carotene-vitamin-a-deficiency-biofortication

http://www.shop.com/op/aprod-p6751894?sourceid=13

http://content.nejm.org/cgi/content/abstract/333/21/1369

http://medical-dictionary.thefreedictionary.com/Vitamin+A+Excess

http://medical-dictionary.thefreedictionary.com/Vitamin+a+solubilized

http://vitamina.researchtoday.net/

http://www.affordablequalityvitamins.com/vitamin_a_and_d.html

http://www.designsbystephene.com/cat-vitamin-a-swimwear.cfm

http://www.medicalnewstoday.com/medicalnews.php?newsid=56582

http://www.neimanmarcus.com/store/catalog/prod.jhtml?itemId=prod38210009&ECID=NMAYSSPPRODUCT

http://www.news-medical.net/?id=14662

http://www.reuters.com/article/healthNews/idUSCOL67428820070226

http://www.irvingstvet.com/library/vitamin_A.htm

http://content.nejm.org/cgi/content/abstract/334/18/1150

http://www.walmart.com/catalog/product.gsp?product_id=5620523

http://www.naturalproductsinsider.com/hotnews/75h4125911.html

http://bloodjournal.hematologylibrary.org/cgi/content/full/95/11/3349

http://www.ezinearticles.com/?The-Facts-On-Vitamin-A-Toxicity

http://na.link.decdna.net/n/10204/10206/www.fragrancex.com/41c1304e00250300000000040002a72f05c460290000000000000000000000000000000100/i/c?0

http://na.link.decdna.net/n/11680/11682/www.wdrake.com/f4079c82002503000000000400005617126915950000000000000000000000000000000100/i/c?0

http://na.link.decdna.net/n/17508/17510/www.thefreedictionary.com/604481df00250300000000040000aa9b0bc6f7bd0000000000000000000000000000000100/i/c?0&pq=/_/partner.aspx?pid=y&set=www&word=vitamin+A

http://www.merck.com/pubs/mmanual/section1/chapter3/3b.htm

http://www.merck.com/pubs/mmanual/section1/chapter3/3c.htm

http://www.oralchelation.com/ingred/vitamina.htm

http://www.skinstore.com/store/category.asp?catID=1789

http://www.tinnituspage.org/deutsch.htm