We have recently found online these two fantastic volumes by #UNESCO to build low cost laboratory tools and uploaded to our repo.
With parts and schematics!!
Download now fellas!!
http://nube.imaxinaria.org/index.php/s/Xw2ZAFRRiDKnNRq
QOTO: Question Others to Teach Ourselves An inclusive, Academic Freedom, instance All cultures welcome. Hate speech and harassment strictly forbidden.