473. For persons born in a foreign country, enter the name of the country only as Belgium, Spain, Italy, Japan, Sweden, etc., except as noted in the following paragraphs. Spell out the name of the country in full. For persons born in any of those central European areas where there have been recent changes in boundaries, enter in col. 15 as country of birth that country in which his birthplace was situated on January 1, 1937. Note that the list of countries in Europe on that date included Austria, Czechoslovakia, and Poland. If you cannot find out with certainty the country in which the person's birthplace was located on January 1, 1937, enter the name of the province, state, or city in which the persons was born, such as Bohemia, Slovakia, Croatia, etc., or Prague, Bratislava, Vienna, etc.
474. Do not return persons as born in Great Britain, but write the name of the particular country, as England, Scotland, Wales, etc. Distinction must be made between Northern Ireland and Irish Free State (Eire); it is not sufficient to report that a person was born in Ireland.
475. French Canadians, i.e., Canadians of French mother tongue, should be distinguished from other Canadians and reported as Canada-French. For all other persons born in Canada, enter Canada, English, even though they may not actually speak English.
476. If a person was born in Cuba or Puerto Rico, enter the name of the island, and not "West Indies."
477. If a person was born at sea, write "At sea."