| LEADER | 00561nam a22001691a 4500 | ||
|---|---|---|---|
| 001 | UNA01000017222 | ||
| 005 | 20120328185343.0 | ||
| 008 | 080728s1977 000 0 spa d | ||
| 040 | |a Sistema de Bibliotecas de la Universidad Nacional de Costa Rica | ||
| 082 | 0 | 4 | |a 636.6 |b E68b |
| 100 | 1 | |a Erskine, Anthony | |
| 245 | 1 | 0 | |a Birds in boreal Canadá : |b communities, densities and adaptations / |c by Anthony J. Erskine |
| 250 | |a 1a. ed. | ||
| 260 | |a Otawa, Can. : |b Minister of Supply and Services , |c 1977 | ||
| 300 | |a 73 p. : |b il. ; |c 28 cm. | ||
| 650 | 0 | 4 | |a AVES |
| 650 | 0 | 4 | |a CANADA |