67- January 1976

68- March 1976

69- April 1976

70- November 1976

71- December 1976

72- January 1977

73- April 1977

74- May-June 1977

75- Aug and Sept

76- December 1977

77- March 78

78- April 1978

79- June 1978

80-July 1978

81-Aug 1978

82- November 1978

83- December 1978

84- February 1979

85- April 1979

86- June 1979

87- August 1979

88- September 1979

89- December 1979

90- February 1980

91- March 1980

92- May 1980

93- June 1980

94- August 1980

95- October 1980

96- December 1980

97- February 1981

98- March April 1981

99- July 1981

100- August 1981

101- November 1981

102- December 1981

103- March 1982

104- April 1982

105- May 1982

106- June 1982

107- July 1982

108- Sept-Oct 1982

109- November 1982

110- December 1982

111- March 1983

112- May 1983

113- June July 1983

114- August 1983

115- October 1983

116- December 1983

117- January 1984

118- April 1984

119- May-June 1984

120- July 1984 (new)

1971-75 series 4