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	1.		An economic evaluation of the TPI process for the production of ligh tweight concrete building blocks utilising rice-husks as the aggregate / P. L. Day and S. R. J. Robbins by Day, P. L Robbins, S.R.J Tropical Products Institute Material type: Text Publication details: London : Tropical Products Institute, 1970 Availability: Items available for loan: Main Library - Open Shelves (1)Call number: P F 666.894 D 39. Place hold Save to lists Add to cart (remove)
	2.		An economic evaluation of the TPI process for the production of ligh tweight concrete building blocks utilising rice-husks as the aggregate / P. L. Day and S. R. J. Robbins by Day, P. L Robbins, S.R.J Tropical Products Institute Material type: Text Publication details: London : Tropical Products Institute, 1970 Availability: No items available. Save to lists Add to cart (remove)
	3.		An economic evaluation of the TPI process for the production of ligh tweight concrete building blocks utilising rice-husks as the aggregate / P. L. Day and S. R. J. Robbins by Day, P. L Robbins, S.R.J Tropical Products Institute Material type: Text Publication details: London : Tropical Products Institute, 1970 Availability: No items available. Save to lists Add to cart (remove)
	4.		An economic evaluation of the TPI process for the production of ligh tweight concrete building blocks utilising rice-husks as the aggregate / P. L. Day and S. R. J. Robbins by Day, P. L Robbins, S.R.J Tropical Products Institute Material type: Text Publication details: London : Tropical Products Institute, 1970 Availability: No items available. Save to lists Add to cart (remove)