Bahia, 1971: Georges Reeb and René Thom (in background, Daniel Weil and Ralph Abraham)

Bahia, 1971: Row 1: Naomi Mather, Joel Robbin, Mo Hirsch, John Franks, Tony Phillips
Row 2: ?,?,?,?,?,?
Row 3: Chris Zeeman, John Guckenheimer, Jean Taylor, Nan Wood, John Wood
Row 4: ?,?,?, Ziggy Nitecki, ?, Jon Sondow
Row 5: ?,?,?,?,?,?, Peter Purcell, ?