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Dyfyniad Arddull ChicagoOutline of Social Insurance in Japan: 1977. Tokyo: Japan International Social Security Association, 1977.
Dyfyniad MLAOutline of Social Insurance in Japan: 1977. Tokyo: Japan International Social Security Association, 1977.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.