Note riguardanti l'effetto di optotypi costanti o variabili sopra fondo variabile o costante / Giuseppe Albertotti.
License information
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
Note riguardanti l'effetto di optotypi costanti o variabili sopra fondo variabile o costante / Giuseppe Albertotti. Credit: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London). Public Domain Mark