“Occupational Health Services As an Effort to Increase the Health of Workers at PT Petrokimia Gresik During the Covid-19 Pandemic”. Nautical : Jurnal Ilmiah Multidisiplin Indonesia, vol. 1, no. 12, Mar. 2023, pp. 899-05, https://doi.org/10.55904/nautical.v1i12.490.