SOME FACTORS AFFECTING THE PERPETUATION OF OUR INDIGENOUS SILVIA.
JACOB GERSTNER
13: 4-11
KOMMERSIELE BOSBOU IN DIE MIDDELLANDE.
P. C. DE VILLIERS
13: 12-18
THE USE OF CHEMICALLY TREATED WOODEN POLES FOR TELEPHONE AND POWER TRANSMISSION LINES IN SOUTH AFRICA.
M. H. SCOTT
13: 21-34
VARIATIONS IN STRENGTH IN PINE TIMBER
13: 19-20
END-COATING CONTROL OF WOOD PRESERVATIVE PENETRATION.
P. M. D. KROGH AND JOHN M. TURNBULL
13: 35-36
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