000 003430000a22001450004500
001 3374
090 _a3374
100 _a19940222d1947 m||y0pory5003 ba
102 _aUS
200 _aSunspots in action
_fH. Stetson
210 _aNew York
_cRonald Press
_d1947
215 _a252 p.
_d20 cm
317 _aOrigem: IM
606 _aASTROFISICA
_z
700 1 _aStetson
_bH.