1969.4.2 ( Commemorative Stamps )
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1969.5.28 ( Commemorative Stamps )
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1969.7.1 ( Commemorative Stamps )
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1969.8.13 ( Commemorative Stamps )
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1969.10.1 ( Commemorative Stamps )
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1969.11.26 ( Commemorative Stamps )
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1970.2.11 ( Commemorative Stamps )
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1970.4.1 ( Commemorative Stamps )
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1970.6.3 ( Commemorative Stamps )
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1970.7.15 ( Commemorative Stamps )
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