Geospatial distributions of organochlorine insecticide in shallot agriculture land at Wanasari sub-district, Brebes regency, Central Java, IndonesiaPoniman, Tri Retnaningsih Soeprobowowati and Muhammad HelmiE3S Web Conf., 202 (2020) 06009DOI: https://doi.org/10.1051/e3sconf/202020206009