IS: 2691-1972 specification for burnt clay facing bricks
I. S. I. Manak Bhawan
IS: 2691-1972 specification for burnt clay facing bricks - Manak Bhavan Delhi I. S.I 1964 - 10
/ ISI
IS: 2691-1972 specification for burnt clay facing bricks - Manak Bhavan Delhi I. S.I 1964 - 10
/ ISI