Letfus, Vojtech   <br/><br/>
Atlas of the green corona synoptic charts for the period 1947-1976 
Vojtech Letfus and Julius Sykora 
 - Bratislava  Slovak Academic of Science  1982 
 - 222p.  figs; plate 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CoronaSun
<br/><br/><label>Universal Decimal Class. No.: </label>523.947:520.86  / LET+SYK