http://travel.state.gov/passport/guide/guide_2081.html

http://travel.state.gov/visa/temp/info/info_1287.html

http://www.passportpictures.org/

http://www.onlinepassportphoto.com/Canadian_Visa_photo_requirements.htm

http://www.onlinepassportphoto.com/Chinese_china_visa_photos_size.htm

http://www.swiss.org.tw/visa/index.htm

http://passports.photo-electric.co.uk/

http://www.apvstudios.com/

http://www.epassportphoto.com/Blog/?tag=/chinese+passport+pictures

http://www.myvisapassport.com/Visa-Thailand.htm

http://passportnation.com/

http://www.onlinepassportphotos.com/sample_passport_photos.htm