Alert Notice 138: Nova Herculis 1991 AND Special request to monitor R Coronae Borealis stars
THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, MA 02138 USA
BITNET: aavso@cfaB SPAN: nssdca::cfa8::aavso
Tel.617-354-0484 FAX 617-354-0665
AAVSO ALERT NOTICE 138 (March 25, 1991)
NOVA HERCULIS 1991