The article is by Teen's legendary beatnik/bohemian photographer Earl Leaf.
On page 47 is another photo of MOI and short notice.

* * *

This is the new teenage rage in California.

It began with release of an MGM two-disk album, “Freak Out!” by Frank Zappa and his Mothers of Invention. The Mothers are six bearded, long-haired musical maniacs who have to be seen (and heard) to be believed. Their first freak out filled Aerospace Hall beyond capacity, and hundreds were turned away. The next one filled Shrine Auditorium, one of L.A.’s largest.  (read more)

Source: slime.oofytv.set