. . . "Atacama Pathfinder Experiment#ATLASGAL" . . . . "Atacama Pathfinder Experiment#Instruments" . . . . . . . . . . "Atacama Pathfinder Experiment" . "Atacama Pathfinder Experiment (APEX)" . . . . "Apex" . . "Atacama Pathfinder Experiment" . . "APEX" . . . .