You may also wish to search for items by Gampper, B. and Gampper.
Only one matching reference was found.
Krishnaiah, A.; Gampper, B.P.; Viswanath, D.S., Densities and viscosities for propylene glycol monomethyl ether + water, J. Chem. Eng. Data, 1993, 38, 401-3. [all data]