00262nam a2200097Ia 4500080001800000245006300018260002600081300001100107500002700118583001900145  a08.10.02 U588  aRice-husk ash cements : their development and applications  bUNIDOaViennaATc1985  a100 p.  aBibliography: p. 89-92  c3/7/00kM2LMGR