SECULAR VARIATION AND PHYSICAL CHARACTERISTICS DETERMINATION OF THE HADS STAR EH Lib.Published in:Information Bulletin on Variable Stars, 2017, v. 63, n. 6231, p. 1, doi. 10.22444/IBVS.6231By:PEÑA, J. H.;VILLARREAL, C.;PIÑA, D. S.;RENTERÍA, A.;SONI, A.;GUILLÉN, J.;CALDERÓN, J.Publication type:Article