1. Ladies Clothing Technology - https://sites.google.com/site/ladiesclothingtechnologydigest/
2. Construction Manuals - https://sites.google.com/site/clothingtechnologydigest2/
3. Technical Books On Line from 1900 to 1950's including - Ladies' Cutting and Garment Making by F R Morris - http://vintagesewing.info/1940s/4x-lgcm/lgcm-fore.html