.245
a	The motion, evolution of orbits, and origin of comets
h	Prosiding-Cetak
.020
a	90-277-0207-1
.100
a	INTERNATIONAL ASTRONOMICAL UNION, Symposium (45th: 1970: Leningrad, U.S.S.R.)
.005
a	20080213121952
.260
a	Dordrecht-Holland
b	D. Reidel
c	1972
.041
a	Inggris
.084
a	523.63 INT
.300
a	xxiii, 521 halaman : gambar, tabel
b	24 cm.
c	xxiii, 521 halaman : gambar, tabel ; 24 cm.
.336
a	Prosiding-Cetak