Wijekoon, R.2020-04-072020-04-071999Annals of the Sri Lanka Department of Agriculture, 1:p.419-427https://dl-doa.nsf.gov.lk/handle/1/1939AGRICULTURE EXTENSION AND COMMUNICATIONAudio visual aidsExtension trainingInteractive multimediaStrategies for the use of interactive multimedia to train extension workers on low cost audio visual aids in developing countriesArticle