General chemistryJohn William Hill, John W. Hill, Ralph H. Petrucci · First published 1996Open the Tome
Supporting concurrency, communication and synchronization in human-computer interactionRalph D. Hill · First published 1987Open the Tome
Handbook of obstetrics & gynecologyRalph Criswell Benson, Mcgraw-hill Healthcare Management Group · First published 1964Open the Tome
