what countries were members of nato in the 1950s?
['The member states of NATO are:', 'In the order of joining NATO:', '1949 – Belgium, Canada, Denmark, France, Iceland, Italy, Luxembourg, Netherlands, Norway, Portugal, United Kingdom, United States.', '1952 – Greece, Turkey.', '1955 – Germany.', '1982 – Spain.', '1999 – Czech Republic, Hungary, Poland.']