000 00289nam a2200097Ia 4500
005 20250424112919.0
008 250424s9999 xx 000 0 und d
300 _ax, 114 p. :ill. ; 29 cm.
650 _aScience--Periodicals. Science--Study and teaching--Pakistan--Periodicals.
942 _cSR
999 _c37850
_d37850