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Search: ex:EX3159
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BP264 Closed area vs. no closed area.
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CROSSREFS

Adjacent-numbered pages:
BP259 BP260 BP261 BP262 BP263  *  BP265 BP266 BP267 BP268 BP269

CONCEPT closed_open (info | search),
hole (info | search)

WORLD

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AUTHOR

Merse E. Gáspár

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