Efek ekstrak etanol 70% rumput mutiara (Hedyotis corymbosa (L.) Lamk.) terhadap kadar kalsium serum darah tikus jantan RA (Rheumatoid Arthritis) = Effect of 70% ethanolic extract of pearl grass (Hedyotis corymbosa (L.) Lamk.) on calcium blood serum level in RA (Rheumatoid Arthritis) male rat - Indana Ayu Soraya, author (Fakultas Farmasi Universitas Indonesia, 2012)