R, 12/13/2024 - 16:09 Katrin Soika 0 Kommentaarid Põlev kiri: https://edu.rsc.org/resources/magic-writing-with-sodium-nitrate-solution/1949.article https://sciencenotes.org/fire-writing-with-invisible-ink/ Tablettide müsteerium: https://docs.google.com/document/d/1sn1UE5UI84A3tO_6LZPY_udOzQx1Yd-jUwQa5sQca0E/edit?usp=sharing katsed 0 meeldimisi