TY  - RPRT
TI  - Portland cement mortars and their constitutent materials, results of tests made at the structural materials testing laboratories, Forest Park, St. Louis, Missouri, 1905-1907
AU  - Richard Lewis Humphrey
AU  - William Jordan
PY  - 1908
DO  - 10.3133/b331
UR  - https://pubs.usgs.gov/publication/b331
ID  - b331
ER  -