I need information about The first album of pop music, as well as containing costume designs position since 1920. which are in your collection

It is not easy to say who is the first pop music musician. But Bing Crosby and Frank Sinatra are maybe the first. According to some sources the first could be also Elvis Presley. Here below you have information about the history of pop music:

http://www.shinemusic.com.au/musicresources/History-of-Pop-Music.aspx

http://www.buzzle.com/articles/pop-music-history.html

http://en.wikipedia.org/wiki/Bing_Crosby_discography

http://www.sinatra.com/

http://www.elvis.com/

Via Helmet Web Library (the web library of Helsinki, Espoo, Vantaa and Kauniainen: http://www.helmet.fi/search~S9/) you can find many books about fashion of the past decades, for example these:

- Style me vintage : clothes : easy techniques for creating classic looks / Naomi Thompson (2012)
- Vintage fashion sourcebook / [Emma Baxter-Wright ... et al (2011)
- Vintage fashion : collecting and wearing designer classics / foreword by Zandra Rhodes (2010)
- 100 years of menswear / Cally Blackman (2009)
- 100 years of fashion : twentieth century in pictures / [editor: Elizabeth Roberts] (2009)
- Costume worldwide : a historical sourcebook, featuring the classic artworks of Friedrich Hottenroth & Auguste Racinet / consultant editor Melissa Leventon (2008)