Explorer Program Helps (replaced Explorer Program Quarterly)

					June 1966	July-Aug 1966		Sept-Oct 1966		Nov 1966	Dec 1966
Jan 1967	Feb 1967	Mar 1967	Apr 1967	May 1967	June 1967	July 1967	Aug 1967	Sept 1967	Oct 1967	Nov 1967	Dec 1967
Jan 1968	Feb 1968	Mar 1968	Apr 1968	May 1968	June 1968	July 1968	Aug 1968	Sept 1968	Oct 1968	Nov 1968	Dec 1968
Jan 1969	Feb 1969	Mar 1969	Apr 1969

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