| 12-17 August 1974: 16th International Ornithological Congress Canberra APM5320
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| 12-17 August 1974: 16th International Ornithological Congress Canberra APM5320 on addressed air mail cover affixed with red, green and brown 7c agate stamp cancelled "12 AUG 1974" FDU
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Item #: INV-127249
Condition Co
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