| 000 | 00781 a2200193 4500 | ||
|---|---|---|---|
| 005 | 20250515022109.0 | ||
| 264 | 0 | _c20060601 | |
| 008 | 200606s 0 0 eng d | ||
| 022 | _a0027-8424 | ||
| 024 | 7 |
_a10.1073/pnas.35.7.405 _2doi |
|
| 040 |
_aNLM _beng _cNLM |
||
| 100 | 1 | _aSmith, P A | |
| 245 | 0 | 0 |
_aHomotopy Groups of Certain Algebraic Systems. _h[electronic resource] |
| 260 |
_bProceedings of the National Academy of Sciences of the United States of America _cJul 1949 |
||
| 300 |
_a405-8 p. _bdigital |
||
| 500 | _aPublication Type: Journal Article | ||
| 773 | 0 |
_tProceedings of the National Academy of Sciences of the United States of America _gvol. 35 _gno. 7 _gp. 405-8 |
|
| 856 | 4 | 0 |
_uhttps://doi.org/10.1073/pnas.35.7.405 _zAvailable from publisher's website |
| 999 |
_c16194861 _d16194861 |
||