Central States Manufacturing & Sales Corp. (doing business as Argo Summit Supply Co.), Summit, IL, was named one of the top businesses in the United States by DiversityBusiness.com, a business-to-business Internet site. The wholesaler was named to the list of the top small businesses in the U.S. that are multicultural, small and/or women-owned, in sectors such as technology, manufacturing, food service and professional services. Argo Summit Supply is a women-owned plumbing supply business, owned and operated by the mother/daughter team of Nadine Schweitzer and Laura Tobolaski. The company specializes in plumbing, heating, air conditioning, kitchen, bathroom and commercial products.