Analysis of information sources in references of the Wikipedia article "Số một Đường vòng quanh Đài quan sát" in Vietnamese language version.
In September 1974, the stately Queen Anne-style home on the grounds of the Observatory formally opened as the home of the vice president of the United States, but with no tenant, since the sitting vice president, Nelson Rockefeller, decided to stay put at his luxurious mansion in Northwest DC.
In September 1974, the stately Queen Anne-style home on the grounds of the Observatory formally opened as the home of the vice president of the United States, but with no tenant, since the sitting vice president, Nelson Rockefeller, decided to stay put at his luxurious mansion in Northwest DC.
