00344nam a2200133Ia 450000500170000008000180001724500630003526000260009830000110012450000270013558300190016294200120018199900170019320260716043022.0  a08.10.02 U588  aRice-husk ash cements : their development and applications  bUNIDOaViennaATc1985  a100 p.  aBibliography: p. 89-92  c3/7/00kM2LMGR  cMmU588  c38798d38798