| 000 | 00461nas a2200157Ia 4500 | ||
|---|---|---|---|
| 008 | 150731s1971 xx 000 0 und d | ||
| 022 | _a0048-7333 | ||
| 245 | _aResearch Policy | ||
| 260 |
_c1971 _bNorth-Holland |
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| 362 |
_a1 (1), 1971 _zFirst Issue Online detail |
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| 362 |
_a40 (1), Feb 2011 _zFirst Issue Access Detail |
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| 500 | _aSubscribed | ||
| 501 | _aFull text | ||
| 856 | _uhttp://www.sciencedirect.com/science/journal/00487333 | ||
| 942 |
_2ddc _cJ |
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| 999 |
_c3660 _d3660 |
||