Analysis of information sources in references of the Wikipedia article "With the Beatles" in English language version.
By the end of 1964 the tally was 980,000, with the million reached in 1965. This was an all-time high for a British album ... Capitol's release in the U.S.A. was even more astonishin. This sold 750,000 in its first week of release, soon passing the million mark. By mid-February 1964 it had sold 1,600,000, by early March 2,800,000 and 3,650,000 by mid-March with an estimated five million by December 1966.
