Ibyago bya geologiya
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Gukurikirana imiturire hamwe na sisitemu yo kuburira hakiri kare
1. ...Soma byinshi -
Gukurikirana inkangu hamwe na sisitemu yo kuburira hakiri kare
1.Soma byinshi -
Gukurikirana ibiza byo kumusozi hamwe na sisitemu yo kuburira hakiri kare
1. Ahanini hafi yuburyo butatu bwo gukurikirana, kuburira hakiri kare no kubisubiza, amazi nimvura ...Soma byinshi -
Gusenya sisitemu yo kugenzura no kuburira
1.Soma byinshi