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Harkins WD. Cohesion, Internal Pressure, Adhesion, Tensile Strength, Tensile Energy, Negative Surface Energy, and Molecular Attraction. Proc Natl Acad Sci U S A. 1919;5(12):562-8doi: 10.1073/pnas.5.12.562.
Harkins, W. D. (1919). Cohesion, Internal Pressure, Adhesion, Tensile Strength, Tensile Energy, Negative Surface Energy, and Molecular Attraction. Proceedings of the National Academy of Sciences of the United States of America, 5(12), 562-8. https://doi.org/10.1073/pnas.5.12.562
Harkins, W D. "Cohesion, Internal Pressure, Adhesion, Tensile Strength, Tensile Energy, Negative Surface Energy, and Molecular Attraction." Proceedings of the National Academy of Sciences of the United States of America vol. 5,12 (1919): 562-8. doi: https://doi.org/10.1073/pnas.5.12.562
Harkins WD. Cohesion, Internal Pressure, Adhesion, Tensile Strength, Tensile Energy, Negative Surface Energy, and Molecular Attraction. Proc Natl Acad Sci U S A. 1919 Dec;5(12):562-8. doi: 10.1073/pnas.5.12.562. PMID: 16576432; PMCID: PMC1091654.
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