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2. Starch analysis;Boehringer Mannheim GmbH,1980
3. Holland Bulb-Forcer's Guide;De Hertogh,1981
4. The tulip: botany, usage, growth and development;De Hertogh;Hortic. Rev.,1983
5. Clean-up of methanolic extract in high-pressure liquid chromatography of fructose, glucose, and sucrose in onion powder;Gorin;J. Agric. Food Chem.,1980