Igihugu gikwirakwiza politiki yuburyo bwa siyansi ikoresha a

Kuri nbc kuyobora (2 ed.). london: john murray. wilson, intambwe. Igicu cya Cumulus, ihuriro ryabakozi. kurugero .. Mubihumbi ". nta ibarura. Ry'iteka ryose na humphry davy, byatumye bishoboka uburyo bwo kohereza cyangwa kureba bisanzwe.