Reference 1: Population.
Reference 2: California, New York, Pennsylvania, Texas, Illinois, Ohio, Michigan, New Jersey, Florida, Massachusetts, Indiana, North Carolina, Missouri, Virginia, Georgia, Wisconsin, Tennessee, Maryland, Minnesota, Louisiana, Alabama, Washington, Kentucky, Connecticut, Iowa, South Carolina, Oklahoma, Kansas, Mississippi, Colorado, Oregon, Arkansas, Arizona, West Virginia, Nebraska, Utah, New Mexico, Maine, Rhode Island, Hawaii, District of Columbia, New Hampshire, Idaho, Montana, South Dakota, North Dakota, Delaware, Nevada, Vermont, Wyoming and Alaska.
Source: http://en.wikipedia.org/wiki/1970_United_States_Census
Reference 2: California, New York, Pennsylvania, Texas, Illinois, Ohio, Michigan, New Jersey, Florida, Massachusetts, Indiana, North Carolina, Missouri, Virginia, Georgia, Wisconsin, Tennessee, Maryland, Minnesota, Louisiana, Alabama, Washington, Kentucky, Connecticut, Iowa, South Carolina, Oklahoma, Kansas, Mississippi, Colorado, Oregon, Arkansas, Arizona, West Virginia, Nebraska, Utah, New Mexico, Maine, Rhode Island, Hawaii, District of Columbia, New Hampshire, Idaho, Montana, South Dakota, North Dakota, Delaware, Nevada, Vermont, Wyoming and Alaska.
Source: http://en.wikipedia.org/wiki/1970_United_States_Census
