000 00671nam a2200157 a 4500
005 20220228110621.0
035 _aF8901000708750
084 _aPCA BUL D14 1956
100 _aCarlson, C. C.
245 _aLightweight aggregates for concrete masonry units / by C. C-. Carlson.
260 _aSkokie, Illinois : atories, Development Department
300 _a[18] p.
440 _aBulletin D14 / Portland Cement Association, Research and De-velopment Laboratories, Development Department
500 _a"Authorized reprint from copyrighted Journal of the America-n Concrete Institute November 1956, Proceedings Vol. 53. p.- 491."
690 _aConcreto - Agregados - Pruebas.
999 _c58779
_d58779