แหล่งที่มา WikiPedia: ความไวแสง ISO http://www.cipa.jp/std/documents/download_j.html?D... http://www.iso.org/ http://www.iso.org/iso/iso_catalogue/catalogue_tc/... http://www.iso.org/iso/iso_catalogue/catalogue_tc/... http://www.iso.org/iso/iso_catalogue/catalogue_tc/... http://www.iso.org/iso/iso_catalogue/catalogue_tc/... https://books.google.co.jp/books?id=MblHnLN2N2kC&p... https://books.google.co.jp/books?id=nHgZHXvqy5sC&p...
