na INLIS000000000001903 20240130081652 0010-0124000346 ta 240130 g 0 ind RF 500 RF 500 GER i Gerrits, G.C. Ilmu Alam 2 Jakarta : Negara Prandja Paramita, 1953 240 hlm. : ilus. ; 21 cm. Ilmu Alam Soemani 20231004.04.019 20231004.04.20