MARC
| LEADER | 00000nam a2200000Ia 4500 | ||
|---|---|---|---|
| 008 | 170504b1971 us ||||| |||| 00| 0 eng d | ||
| 999 | |c 1190 |d 1190 | ||
| 090 | |a 507 |b W442s | ||
| 100 | 1 | |a Welch, Wayne W. |9 2696 | |
| 245 | 1 | 2 | |a A summary of research in science education for the years of 1968-69 secondary school level |
| 260 | |a Ohio, Estados Unidos : |b ERIC, |c 1971 | ||
| 300 | |a 60 páginas | ||
| 650 | 1 | 4 | |a CIENCIA |9 890 |
| 650 | 1 | 4 | |a ENSEÑANZA |9 14 |
| 942 | |i 257325 |h 507 W442s |2 z |c 01 | ||