R. Helmuth
发表
R. Helmuth,
R. A. Helmuth,
1987
.
R. Helmuth,
1986
.
T C Powers,
R A Helmuth,
R. Helmuth,
2008,
SP-249: Selected Landmark Paper Collection on Concrete Materials Research.
R. Helmuth,
P. West,
1998
.
D. Whiting,
R. Helmuth,
H. Love,
1986
.
R. Helmuth,
1996
.
Some Questions Concerning ASTM Standards and Methods of Testing Fly Ash for Use with Portland Cement
R Helmuth,
R. Helmuth,
1983
.
R. Helmuth,
2017
.
David Stark,
S. Diamond,
R. Helmuth,
1993
.
S Bhattacharja,
D. Whiting,
R. Helmuth,
1995
.
R. Helmuth,
R A Helmuth,
1961
.