Tangkas Sains SD Kelas 4 / editor, Popi, Rismala /

Tangkas Sains SD Kelas 4 / editor, Popi, Rismala / Soenarjo, Yayat, Ibayati Tati, Suryani, text Bandung : Remaja Rosdakarya, 2004 ind 239 Sains URN:ISBN:979-692-299-1