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1Code of practice for the safe use of soil moisture and density gauges containing radioactive sourcesPublished 1994### CRL customization ### ?> ### Add publisher and desc details ### ?>[Pretoria] : Dept. of National Health and Population Development, 1994.10 p. ; 30 cm.
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2Published 1994### CRL customization ### ?> ### Add publisher and desc details ### ?>Pretoria : Dept. of National Health and Population Development, 1994.9 p. ; 30 cm.