Index of /perinatal/1999/data/archive
Parent Directory
den99.sas
num99.sas
tden99.sas
tnum99.sas
tunl99.sas
unl99.sas
Apache/2.4.46 (FreeBSD) PHP/7.4.16 OpenSSL/1.1.1h-freebsd mod_apreq2-20090110/2.8.0 mod_perl/2.0.11 Perl/v5.32.0 Server at data.nber.org Port 80