@article{Groos, author = {Groos, Karl}, title = {The Play of Man}, series = {Gross, K.: The Play of Man, New York (Appleton \& Co.) 1914, pp. 1-5, 74-81, 174-175, 186-188, 197-199, 216-219, 254-255, 280-286, 334-338, 369-379 and pp. 1-5, 361-406 (second photocopy).}, journal = {Gross, K.: The Play of Man, New York (Appleton \& Co.) 1914, pp. 1-5, 74-81, 174-175, 186-188, 197-199, 216-219, 254-255, 280-286, 334-338, 369-379 and pp. 1-5, 361-406 (second photocopy).}, language = {en} }