$15
Hayden-McNeil brand. Still ~90 pages left: only ~10 pages used and removed. Originally $40, see this Amazon link: https://www.amazon.com/Student-Lab-Notebook-Carbonless-Duplicate/dp/1429224541/ref=sr_1_6?dchild=1&keywords=student+lab+notebook+hayden-mcneil&qid=1628458256&sr=8-6
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