University of Guyana Library Search for 'au:Billington, Ray Allen.'

America's frontier heritage /

Albuquerque : University of New Mexico Press, 1974 . x, 310 p. 0826303102 (pbk.)

New York : Holt, Rinehart and Winston, 1969 . xxi, 657 p.

Washington, D.C. : American Historical Association, 1971 . 58 p. , 1958 and 1965 editions published under title : The American frontier.

New York: Harper 1956 . 324 p.

New York : Holt, Rinehart and Winston, 1962 . 2 v.

Gloucester, Mass.: P. Smith, 1938 . vii, 514 p.,

New York : Macmillan, 1960 . xv, 893 p. :