Comparison of patchouli oil from Samal City, San Isidro and Mati, Davao Oriental / Roselyn V. Regino.
Physico-chemical characteristics and stability of essential oil from dried leaves of pogostemon heymeanus benth / by Reynaldo M. Nogodula.
Effect of drying methods on percent yield and quality of essential oil from pogostemon heyneanus benth. [India patchouli] / by Angela B. delos Santos.–
