A notebook on geometry, mathematics and the Indonesian nationalist ideology of Pancasila. The term rishu (daybook) is normally used for divinatory texts, but has the connotation of notebook here.
Notes on various topics by a Chinese-Indonesian student attending a school in or near Kutoarjo, west of Yogyakarta. Corrections have been made using a red and blue pencil.
This is an exercise book for various classes used by a Chinese-Indonesian student at his school in Yogyakarta in 1963. Corrections and grades have been added in red.