1. Growth, herbage and oil yields of patchouli (Pogostemon patchouli) as influenced by cultivars and nitrogen fertilization;Bhaskar;Indian Perfumer,1995
2. Apparatus for the determination of volatile oil;Clevenger;Journal of American Pharmaceutical Association,1928
3. The influence of soil moisture on water movement, crop root and water uptake;Hamblin;Advances in Agronomy,1985
4. Essential Oil Plants and Their Cultivation;Husain,1994
5. Natural essential oils. Current trends in production, marketing and demand;Robbins;Perfumer and Flavorist,1983