TY  - GEN
AU  - Hognestad, E.
AU  - Hanson, N. W.
AU  - Mchenry, D.
AU  - 
ED  - Illinois.Portland Cement Association
TI  - Concrete stress distribution in ultimate strenth design: bulletin D49
U1  - 691.5 
PY  - 0000///
CY  - Skokie
PB  - Portland Cement Association
N1  - Bulletin D6 &D6a; Inludes bulletin D6A: Discussion and Supplement to bulletin D6
ER  -