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Book summary

Serendipity:

• Demography and Retirement: The Twenty-First Century by Anna M. Rappaport (9780275942489)
• On The Study And Difficulties Of Mathematics by Augustus De Morgan (9781417912018)
• Auktsiony: Podgotovka, Provedenie, Sudebnye Spory Spravochnik by M. IU Medvedev (9785720504953)