M. F. Crawford؛ H. L. Welsh؛ J. L. Locke (1949). "Infrared absorption of oxygen and nitrogen induced by intermolecular forces". Phys. Rev. ج. 75 ع. 10: 1607. Bibcode:1949PhRv...75.1607C. DOI:10.1103/PhysRev.75.1607.
M. F. Crawford؛ H. L. Welsh؛ J. L. Locke (1949). "Infrared absorption of oxygen and nitrogen induced by intermolecular forces". Phys. Rev. ج. 75 ع. 10: 1607. Bibcode:1949PhRv...75.1607C. DOI:10.1103/PhysRev.75.1607.