The Song Play Book: Singing Games for Children. E-book. Formato PDF Mary A. Wollaston   -  Forgotten Books, 2017  - 

These fifty song-plays have been chosen from a great number because of their adaptability to class-room and playground conditions; they also afford a large amount of vigorous exercise in proportion to the small amount of singing demanded. London Bridge and games of similar type, though favorites with the children, have been purposely omitted since they are games in which the amount of singing and exercise is not proportionate.