@book{montessori_maria_2015, address = {Amsterdam}, title = {Maria {Montessori} {Writes} to {Her} {Father}: {Letters} from {California}, 1915}, url = {http://www.worldcat.org/oclc/927808426}, language = {eng}, publisher = {Montessori-Pierson Publishing Company}, author = {Montessori, Maria}, year = {2015} }