by Karl Groos
by António Aurélio da Costa Ferreira
by Mary Scharlieb, Frederick Arthur Sibly
by James Sully
by William T. Preyer
by Sanford Bell
by American Institute of Child Life
by E. R. (Elsie Riach) Murray, Henrietta Brown Smith
by Antoinette Abernethy Lamoreaux
by Josephine Siebe
by F. D. (Frederick Douglas) How
by H. Addington (Henry Addington) Bruce