The Internet Archive discovers and captures web pages through many different web crawls.
At any given time several distinct crawls are running, some for months, and some every day or longer.
View the web archive through the Wayback Machine.
books.google.com - This publication presents a series of studies conducted by the European Population Committee between 1998 and 2001 together with specialised research institutes in eight European countries: Belgium, Germany, Great Britain, the Netherlands, Switzerland, Norway, Portugal and Estonia. These focus on groups...http://books.google.com/books/about/The_Demographic_Characteristics_of_Immig.html?id=mmaRpUa1oSoC&utm_source=gb-gplus-shareThe Demographic Characteristics of Immigrant Populations