.245
a	Sound transmission in and radiation from hard-walled annular ducts related to fan engine inlets
h	Buku-Bacaan Pengaya Nonfiksi
.020
a	[ISBN not available ; ISBN tidak tersedia]
.100
a	LAAN, J.N.
.005
a	20241002095642
.260
a	Amsterdam
b	NLR
c	1975
.041
a	Inggris
.084
a	620.21 LAA
.300
a	67 halaman : gambar, tabel
b	30 cm
c	67 halaman : gambar, tabel ; 30 cm
.490
a	NLR TR 75144 U
.336
a	Buku-Bacaan Pengaya Nonfiksi