TY  - GEN
AU  - Lawver, David E.
AU  - Creative Educational Video
TI  - Concrete : composition and mixing [electronic resource]
CY  - Lubbock
KW  - CONCRETE - Audiovisual Materials
KW  - CONCRETE MIXURES AND MIXING
KW  - CONCRETE PRODUCTS
N1  - Creative Educational Video prod; 36 min; Supplement included. [11]p
ER  -