TY  - BOOK
TI  - Proceedings of the National Academy of Sciences of the USA
SN  - 0027-8424
PY  - 1915///
CY  - USA
PB  - Proceeding of the National Academy ofSciences of the USA
N1  - ProceedingsOffice,2101Cons tituti on Ave., N.W., Washington DC 20418. Washington DC
ER  -