https://cris.biu.ac.il/en/publications/the-shortest-poem-on-life-poetry-and-being-according-ruebenr-in-h/
The Shortest Poem on Life: Poetry and Being according Ruebenr (In Hebrew) - Bar-Ilan University
https://www.kestenbaum.net/auction/lot/Auction-90/090-204/request-an-estimate
A Maskilic Miscellany. Consisting of a Hebrew essay, poetry, a play; along with tributes to Sir...
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