izlaidumi no David Helfand

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Cover for David Helfand · The Universal Timekeepers: Reconstructing History Atom by Atom (Paperback Book) (2025)

The Universal Timekeepers: Recon... (2025)

Cover for David Helfand · The Universal Timekeepers: Reconstructing History Atom by Atom (Hardcover Book) (2023)

The Universal Timekeepers: Recon... (2023)

Cover for David Helfand · A Survival Guide to the Misinformation Age: Scientific Habits of Mind (Paperback Book) (2017)

A Survival Guide to the Misinfor... (2017)

Cover for David Helfand · A Survival Guide to the Misinformation Age: Scientific Habits of Mind (Hardcover Book) (2016)

A Survival Guide to the Misinfor... (2016)