Roy, D. M. (Personal Name)

Author's Evaluation of cement borehole plug longevity, 1981: t.p. (D.M. Roy) cover (Materials Research Lab., Penn. State Univ., University Park, PA)

Fly ash and coal conversion by-products, c1986: t.p. (Della M. Roy; Pa. State Univ.)

Concrete and grout in nuclear ... c1995: t.p. (D. M. Roy) p. iv (Della M. Roy; ACI Committee 227, Radioactive and Hazardous Waste Management)