You may also wish to search for items by Okabe, T. and Okabe.
Only one matching reference was found.
Kobe, K.A.; Okabe, T.S.; Ramstad, M.T.; Huemmer, P.M., p-Cymene Studies. VI. Vapor Pressure of p-Cymene, Some of its Derivatives and Related Compounds, J. Am. Chem. Soc., 1941, 63, 3251. [all data]