"Scientific Organisation" . . . . . . "American Crystallographic Association" . . . . . . . . . . "American Crystallographic Association (ACA)" . . . "Promote interactions among scientists who study the structure of matter at atomic resolution" . . "Structure Matters" . "ACA" . . . . "2,200 in > 60 countries" . . . . . . . "American Crystallographic Association" . . . . .