na NUTBA000000000003228 20140807155548.0 978-603-8637-33-2 0010-081400000000072 NBPDMAT 373.7 373.7 Ryu e Ryu Tri Ensiklopedi matematika / Ryu Tri Jakarta : Uranus Publishing, 2009 6 jil : ilus. ; 25 cm. Matematika-SD 21404302