Nonyŏn'gi kŏn'gang kwalli
By: chŏja Kim Kwŏn-ch'un, Kim Yŏng-ch'ŏl
Publisher: Ŭihak Kwahak Ch'ulp'ansa
Published: 2012
Place of publication: [P'yŏngyang]
Language: kor
Number of pages: 128
ISBN-13: 9789946101392
Subjects: Aging; Health and hygiene; Geriatrics; Older people