00962     2200241   4500001002100000005001500021035002000036007000300056008004100059082001500100084001700115100003300132245033100165260002900496300004500525500004200570650002900612040001700641090001900658850001200677041001300689990001800702INLIS00000000084379420190107051200  a0010-0119000161ta190107                g          0 dut  04223a541.37  a541.37 HAR e1 aHarpen, Nicolaas Hendrik van1 aDe electrometrische bepaling van de waterstofionenconcentratie in de latex van Hevea Brasiliensis en hare toepassing op technische vraagstukken = the electrometric determination of the hydrogen ion concentration in the latex of Hevea Brasiliensis and its applicability to technical problems /coleh Nicolaas Hendrik van Harpen3 aMedan :bVarekamp,c1930  a458 halaman :bilustrasi, curva ;c25 cm  aTeks dalam bahasa Belanda dan Inggris 4aElektrokimia--xHidrogen  aYOPDYOGbind  aL 541.37 HAR e  aYOPDYOG0 adutgeng  a61885-PD/A.18