Shoemaker, R.A.; Babcock, C.E. 1985: Canadian Journal of Botany 63(7)
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| Shoemaker, R.A.; Babcock, C.E. 1985: Canadian Journal of Botany 63(7) |
| Shoemaker, R.A.; Babcock, C.E. 1985: Canadian Journal of Botany 63(7) |