4.0 International license. You are free: to share – to copy, distribute and transmit the work to remix – to adapt the work Under the following conditions:
authoring system. The program illustrates use oftext, graphics, animation, sound, and photo image in an institutional setting. Material for the demo centers
secrecy, who collaborated to write a number of serial mystery and adventure books for children and youth. Work period 1899 to 1987 Authority file : Q7621901
so this work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years