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PDF: 1.3: https://readergalaxyscan.files.wordpress.com/2021/07/trainingc1-3.pdf
2.1: https://readergalaxyscan.files.wordpress.com/2021/07/trainingc2-1.pdf
> Download:
ch1.3: https://drive.google.com/drive/folders/1TxmVUNdItZwQYYfnI_RsIBmZa40Y3kwV?usp=sharing
ch2.1: https://drive.google.com/drive/folders/1FOA48RxlXhBiv-PT401poiSJr7FuSxdX?usp=sharing