Wikipedia: en.wikipedia.or ... https://en.wikipedia.org/wiki/Apollo_(magazine)
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Wikipedia: en.wikipedia.or ... https://en.wikipedia.org/wiki/Apollo_(magazine)
Wikidata: www.wikidata.or ... http://www.wikidata.org/entity/Q15109445
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Google: www.google.com/ ... https://www.google.com/search?q=ISSN+"0003-6536"
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Yahoo: search.yahoo.co ... https://search.yahoo.com/search?p=ISSN%20%220003-6536%22
MIR@BEL: reseau-mirabel. ... https://reseau-mirabel.info/revue/issn/0003-6536