00538caa a2200157   4500008004100000022001400041100001900055245015600074260000900230300001200239490002100251700001600272773006000288942001500348999001700363210629s9999    xx            000 0 und d  a2230-794X  aUpadhyay, A. K 0aEffectiveness of multimedia as teaching learning material in instruction of environmental science to children with hearing impairment at primary level.  c2017  a 12-18.  vVolume 9 Issue 1  aJan, S. G.   aJournal of National Convention of Educators of the Deaf  cFJASyFJAS  c18032d18032