30829
For multiwall carbon nanotubes , ISO / TR 10929 identifies the basic properties and the content of impurities , while ISO / TS 11888 describes morphology using scanning electron microscopy , transmission electron microscopy , viscometry , and light scattering analysis .
 ISO, ISO
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 ISO, ISO