000			00733nam a2200205Ia 4500
003			BD-DhNLB
005			20230124115114.0
008			810518s1981 dcua j b 001 0 eng
020			_a0870443364 :;0870443410 (lib. bdg.) :
040			_aDLC
041			_heng
082			_a500 _219 _bHID 1981
245		0	_aHidden worlds.
260			_aWashington, D.C. : _bNational Geographic Society, _cc1981.
300			_a104 p. : _bill. (some col.) _c28 cm.
504			_aBibliography: p. 103.
650			_aVision;Microscopy;Telescopes;Radiography;Vision.;Microscopes.;Microscopy.;Telescopes.;Radiography. _xJuvenile literature.;Juvenile literature.;Juvenile literature.;Juvenile literature. _926883
942			_2ddc _cBK
999			_c25827 _d25827