VARIABILITY OF CASE-621 AND MSB 57

[1] GREENE AE, 1971, THESIS OHIO STATE U

[2] KUKARKIN BV, 1969, GENERAL CATALOGUE VA

[3] KUROCHKIN NE, 1959, PEREMMENYE ZVEZDY, V12, P277

[4] MERRILL PW, 1942, PASP, V54, P107

[5] CARBON STARS IN 2 NORTHERN MILKY WAY ZONES [J]. ASTROPHYSICAL JOURNAL, 1957, 125 (01) : 195 - 208

[6] Radial velocities of 283 stars of spectral classes R and N [J]. ASTROPHYSICAL JOURNAL, 1944, 99 (02) : 145 - 161

[7] SPECTRAL CLASSIFICATIONS FOR NEW OR PREVIOUSLY UNCLASSIFIED CARBON STARS [J]. ASTROPHYSICAL JOURNAL, 1965, 142 (02) : 712 - +

[8] WING RF, 1967, COLLOQUIUM LATE TYPE

[1] GREENE AE, 1971, THESIS OHIO STATE U

[2] KUKARKIN BV, 1969, GENERAL CATALOGUE VA

[3] KUROCHKIN NE, 1959, PEREMMENYE ZVEZDY, V12, P277

[4] MERRILL PW, 1942, PASP, V54, P107

[5] CARBON STARS IN 2 NORTHERN MILKY WAY ZONES [J]. ASTROPHYSICAL JOURNAL, 1957, 125 (01) : 195 - 208

[6] Radial velocities of 283 stars of spectral classes R and N [J]. ASTROPHYSICAL JOURNAL, 1944, 99 (02) : 145 - 161

[7] SPECTRAL CLASSIFICATIONS FOR NEW OR PREVIOUSLY UNCLASSIFIED CARBON STARS [J]. ASTROPHYSICAL JOURNAL, 1965, 142 (02) : 712 - +

[8] WING RF, 1967, COLLOQUIUM LATE TYPE