Volumes 1 to 15 of The Prairie Oil Scout, a bulletin edited by John P. Howard in Regina, Saskatchewan.
PI-997: Volume 1, September 15 to December 31, 1953.
PI-998: Volume 2, January 7 to June 29, 1954
PI-999: Volume 3, July 1 to December 30, 1954
PI-1000: Volume 4, January 4 to June 30, 1955
PI-1001: Volume 5, July 5 to December 31, 1955
PI-1002: Volume 6, January 5 to June 28, 1956
PI-1003: Volume 7, June 30 to December 29, 1956
PI-1004: Volume 8, January 1 to June 29, 1957
PI-1005: Volume 9, July 4 to December 31, 1957
PI-1006: Volume 10, January 4 to June 28, 1958
PI-1007: Volume 11, July 3 to December 30, 1958
PI-1008: Volume 12, January 1 to June 30, 1959
PI-1009: Volume 13, July 4 to December 31, 1959
PI-1010: Volume 14, January 5 to June 30, 1960
PI-1011: Volume 15, July 5 to December 31, 1960.