Teknik Lab1
http://kriemhild.uft.uni-bremen.de/nop/id/articles/pdf/TechnicalDirectives_id.pdf
http://www.apd.army.mil/pdffiles/p385_61.pdfhttp://www.safety.vanderbilt.edu/chem/lab-chemical-safety-manual.pdf
http://www.dosh.gov.my/images/dmdocuments/glx/Guidelines-on-storage-of-hazardous-chemical-A-guide-for-a-safe-w.pdf
http://www.acs.org/content/dam/acsorg/education/policies/safety/chemical-safety-for-teachers-and-their-supervisors.pdf
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