Um... I was nine years old in the 1970s. Can't say I wore anything like the bell-bottom denims, embroidered tunic, or knitted hat sported by these fashionable young ladies, however. I think I was a bit too young for that; they're dressed more like sophisticated versions of my teenage babysitters than like me. No doubt the styles are meant to resemble those of young adults, unless things were different in San Francisco. Instead, I'm having not-so-fond recollections of Jordache jeans, feathered hair a la Farrah Fawcett, barrettes, and turtlenecks with vests. On the other hand, the red plaid top and dark green jeans do look pretty familiar.
With regard to the NYT piece, I also remember the bicentennial, watching news about the Vietnam War on my friend's parents' TV, and Carter's election to the presidency (which we learned about during 2nd grade recess). My hair was nowhere near long enough to roll up with orange juice cans, though. That practice is actually news to me.