The class routine of 18 to 21 series: https://mte.ruet.ac.bd/public/storage/files/class-routine-of-18-to-21-series_1695622120_1696126833.pdf
The class routine of 22 series: https://mte.ruet.ac.bd/public/storage/files/class-routine-of-22-series_1695622105_1695639832_1695737043.pdf