Or probably high-end audio takes a slightly more trained ear to comprehend than excellent quality video demands trained observation. Cheaper wools can regularly measure this, but quality cashmere should measure no more than 19microns.
Run ads in established ezines usually are archived via internet. https://Www.digitaljournal.com/pr/news/press-advantage/contractors-state-license-center-is-offering-classes-for-contractors-license-in-los-angeles