Perhaps you should try some spelling variations:
"sequential networks. historical studies" » "terrestrial networks. historical studies"
"sequence networks. historical studies" » "frequency networks. historical studies", "influence networks. historical studies", "reference networks. historical studies"
"sequence networks. historical survey" » "frequency networks. historical survey", "influence networks. historical survey", "reference networks. historical survey"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sequence networks. historical studies") OR ("sequence networks. historical survey"))) OR ("sequential networks. historical studies")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"sequence networks. historical studies\") OR (\"sequence networks. historical survey\"))) or (\"sequential networks. historical studies\"))".
• Removing quotes may allow a broader search: (((( sequence networks. historical studies ) OR ( sequence networks. historical survey ))) or ( sequential networks. historical studies )).
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