I’ve never seen WR Mysteries of the Organism but it sounds like one of those films every cineaste needs to see.  

Amos Vogel writes: One of the subversive masterpieces of the 1970s: a
hilarious, highly erotic political comedy which quite seriously
proposes sex as the ideological imperative for revolution.”—Amos Vogel.

There are going to be quite a few other movies, too. Here’s the blurb about the Yugoslavian festival at the BAM Cinematek.

Yugoslavian Black Wave
was one of the most anarchic and politically subversive of all 1960s
cinema movements, frequently running afoul of official Yugoslavian
government policy. Combining artistic, sexual, and ideological freedom
often with a sense of humor, the Black Wave reinvented existing notions
and standards of cinematic realism—mud, blood, tears, bleakness,
destruction of illusions—that for a brief moment produced some of the
most liberating cinema the world has ever seen. When re-introduced to
audiences, Karpo Godina and Zelimir Zilnik, among others, will
certainly join the beloved Dušan Makajevev with the status of great
masters.