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Songkiat Visuttipitakul. 1976. Accumulation of residual soil nitrogen and its relation to yield and nitrogen content of red beet (Beta vulgaris L.) in the lockyer valley. Department of Agriculture, University of Queensland;
Songkiat Visuttipitakul. (1976) Accumulation of residual soil nitrogen and its relation to yield and nitrogen content of red beet (Beta vulgaris L.) in the lockyer valley . University of Queensland/[S.l.].
Songkiat Visuttipitakul. Accumulation of residual soil nitrogen and its relation to yield and nitrogen content of red beet (Beta vulgaris L.) in the lockyer valley. . [S.l.]:University of Queensland, 1976.
Songkiat Visuttipitakul. (1976) Accumulation of residual soil nitrogen and its relation to yield and nitrogen content of red beet (Beta vulgaris L.) in the lockyer valley . University of Queensland/[S.l.].