Dear Aspidofriends,
I am looking for this next reference:

Baranova, ZI., & Saveleva, TS., 1972. Echinodermata. Pp. 271-291. In: Identification key to the fauna of Black & Azov Seas. Volume 3. Free living invertebrates. Arthropoda (except Crustacea), Molluscae, Echinodermata, Chaetognatha, Chordata (Vodyanitzkii, VA., ed.). Naukova Dumka, Kiev. 337 pps.
 
Hope you can help.
Cheers,

Francisco

Dr. Francisco A. Solís Marín
Investigador Titular B, de TC
Colección Nacional de Equinodermos
Instituto de Ciencias del Mar y Limnología
UNAM