To foster the practice of bookkeeping, the blue return system was introduced in 1950 as a part of comprehensive tax reform based on the recommendations of Dr. Carl Shoup.
Carl Sagan | Carl Jung | Carl Orff | Carl Maria von Weber | Carl Lewis | Carl Zeiss AG | Carl Linnaeus | Carl Sandburg | Carl XVI Gustaf of Sweden | Carl Levin | Carl Zeiss | Carl Michael Bellman | Carl Friedrich Gauss | Carl Froch | Carl Perkins | Carl von Clausewitz | Carl Reiner | Carl Hancock Rux | Carl Gustaf Emil Mannerheim | Carl Edwards | Carl Cox | Carl Bildt | Carl Barks | Carl Wilson | Carl Schmitt | Carl Milles | Carl Crawford | Carl Bernstein | Carl Andre | Carl Van Vechten |