Alberta Girls -- Film Description:
"This is a short film about the Alberta All Girls Band Spectacular. The Edmonton-based band was invited to open the 1974 World Cup Soccer Championship at the Munich Olympic Stadium. They performed before a combined live and television audience of over half a billion people. The precise marching formations and fine musicianship are impressive."
-- National Film Board of Canada

Source:
National Film Board of Canada. "NFB -- Alberta Girls" National Film Board of Canada. http://onf-nfb.gc.ca/en/our-collection/?idfilm=11792.