Simptomatologie, morfologie en anatomie van vlek (marbrure) by wingerd met spesifieke verwysing na Richter 99 (Vitis Berlandieri P. X Vitis Rupestris S.)

Spreeth, N. A (1986)

Proefskrif (M.Sc.Agric.) -- Universiteit van Stellenbosch, 1986.

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