杉健一 (Japanese Wikipedia)

Analysis of information sources in references of the Wikipedia article "杉健一" in Japanese language version.

refsWebsite

Global rank Japanese rank

304^th place

20^th place

1,528^th place

1,068^th place

1modernjeweler.com

low place

low place

1itoigawa.lg.jp

low place

4,529^th place

low place

low place

gia.edu

ページ78〜89 Summer 1987年

itoigawa.lg.jp

city.itoigawa.lg.jp

日本の新鉱物 1934-2000

mindat.org

Sugilite (英語), MinDat.org, 2011年11月9日閲覧。（英語）

modernjeweler.com

MODERN JEWELLER "Sugilite"...Without a doubt, the most imaginative and extensive marketing of sugilite as a jewelry gem was undertaken in 1984-1985 by I. Kurgan, a South African diamond firm that had opened an office in Los Angeles.

nii.ac.jp

cir.nii.ac.jp