1. Sugar maple and yellow birch seed dispersal from a fully stocked stand of nature northern hardwoods in the upper peninsula of Michigan, Lake States Forest of Michigan;Benzie,1959
2. Observations on tje collection and burial of acorns by jays in Hainault Forest;Chettleburgh;British Birds,1952
3. A Markov contingency model for replicated Lotka-Volterra systems near equilibrium;Cohen;Amer. Natur,1970
4. The modification of mid-latitude grasslands and forests by man;Curtis,1956
5. Nonnegative square matrices;Debreu;Econometrica,1953