TY - BOOK AU - Purslow, D.F. TI - Results of field tests on the natural durabililty of timber (1932-1975) U1 - P 634.982 21st ed. PY - 1975/// CY - Buckinghamshire PB - Building Research Establishment KW - Softwoods KW - Species of timber KW - Natural durability classification N1 - Building Research Establishment Current Paper, Princes Risborough laboratory ER -