Choudhury, N. K. D.
Sound diffraction around movable partitions in teaching spaces / N. K. D. Choudhury - Bangkok : UNESCO Regional Office for Education in Asia, 1973. - 61p. : illus. ; 29 cm.
Moving Pictures.
727 / CHS
Sound diffraction around movable partitions in teaching spaces / N. K. D. Choudhury - Bangkok : UNESCO Regional Office for Education in Asia, 1973. - 61p. : illus. ; 29 cm.
Moving Pictures.
727 / CHS