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1969-12-15 Hourglass
1970-01-26 Hourglass
1970-03-04 Hourglass
1970-04-22 Hourglass
1970-05-11 Hourglass
1970-09-18 Hourglass
1970-10-02 Hourglass
1970-10-16 Hourglass
1970-10-30 Hourglass
1970-11-13 Hourglass
1970-11-30 Hourglass
1970-11-30 Hourglass Special Issue
1970-12-11 Hourglass
1971-01-19 Hourglass
1971-01-29 Hourglass
1971-02-05 Hourglass
1971-02-19 Hourglass
1971-03-05 Hourglass
1971-03-29 Hourglass
1971-05-07 Hourglass
1971-09-17 Hourglass
1971-10-08 Hourglass
1971-10-29 Hourglass
1971-11-19 Hourglass
1971-12-10 Hourglass
1972-01-28 Hourglass
1972-02-18 Hourglass
1972-03-10 Hourglass
1972-03-17 Hourglass
1972-03-27 Hourglass
1972-05-03 Hourglass
1972-09-25 Hourglass
1972-10-16 Hourglass
1972-11-06 Hourglass
1972-12-01 Hourglass
1972-12-18 Hourglass
1973-02-13 Hourglass
1973-03-07 Hourglass
1973-04-18 Hourglass
1973-09-24 Hourglass
1973-10-17 Hourglass
1973-11-12 Hourglass
1973-12-14 Hourglass
1974-02-08 Hourglass
1974-03-06 Hourglass
1974-04-23 Hourglass
1974-05-10 Hourglass
1974-11-26 Hourglass
1975-02-14 Hourglass
1975-02-28 Hourglass
1975-03-30 Hourglass
1975-05-06 Hourglass
1975-06-00 Hourglass
1975-09-10 Hourglass
1975-10-27 Hourglass
1975-11-14 Hourglass
1975-12-00 Hourglass
1976-02-16 Hourglass
1976-02-20 Hourglass
1976-04-01 Hourglass
1976-05-05 Hourglass
1976-08-25 Hourglass
1976-10-04 Hourglass
1976-10-27 Hourglass
1976-11-23 Hourglass
1976-12-16 Hourglass
1977-01-28 Hourglass
1977-03-03 Hourglass
1977-04-02 Hourglass
1977-05-02 Hourglass
1977-10-14 Hourglass
1977-11-15 Hourglass
1978-09-08 Hourglass
1978-10-06 Hourglass
1978-10-27 Hourglass
1978-11-17 Hourglass
1978-12-08 Hourglass
1979-02-09 Hourglass
1979-03-02 Hourglass
1979-03-30 Hourglass
1979-04-20 Hourglass
1979-09-10 Hourglass
1979-10-05 Hourglass
1979-10-26 Hourglass
1979-11-16 Hourglass
1979-12-07 Hourglass
1980-02-01 Hourglass
1980-02-22 Hourglass
1980-03-28 Hourglass
1980-04-18 Hourglass
1980-09-26 Hourglass
1980-10-17 Hourglass
1980-11-12 Hourglass
1980-12-10 Hourglass
1981-01-30 Hourglass
1981-02-17 Hourglass
1981-03-05 Hourglass
1981-04-03 Hourglass
1981-05-06 Hourglass
1981-09-25 Hourglass
1981-10-23 Hourglass
1981-11-23 Hourglass
1981-12-16 Hourglass
1982-02-05 Hourglass
1982-02-26 Hourglass
1982-03-31 Hourglass
1982-05-05 Hourglass
1982-10-01 Hourglass
1982-10-25 Hourglass
1982-11-22 Hourglass
1983-02-04 Hourglass
1983-02-25 Hourglass
1983-03-25 Hourglass
1983-04-25 Hourglass
1983-09-19 Hourglass
1983-10-11 Hourglass
1983-10-31 Hourglass
1983-11-23 Hourglass
1984-01-31 Hourglass
1984-02-14 Hourglass
1984-03-20 Hourglass
1984-04-24 Hourglass
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