TY - BOOK AU - Bureau of Indian Standards TI - Portland Pozzolana Cement Specification: Part - 1 Fly Ash Based (IS : 1489 (Part 1) - 1991) U1 - IS : 1489 (Part 1) - 1991 PY - 1991/// CY - New Delhi PB - Bureau of Indian Standards KW - Indian Standard - IT N1 - IS : 1489 (Part 1) - 1991 ER -