1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M
1981ApJ...246..569M