TY - BOOK AU - Mattock, Alan H. AU - Kaar, Paul H., coaut. TI - Precast-prestressed concrete bridges 6. test of half-scale -highway bridge continuous over two spans / by Alan H. Matto-ck and Paul H. Kaar CY - Skokie, Illinois : atories, Development Department N1 - "Reprinted from the Journal of the PCA Research and Develop-ment Laboratories Vol. 3, No. 3, 30-70 (september, 1961)." ER -