“…In fact, others have observed similar results (Waldroup et al, 1971;Shannon and McNab, 1972;Woodham and Deans, 1973;Van Weerden et al, 1970;Tajina et al, 1971;Yoshida, 1975). In fact, others have observed similar results (Waldroup et al, 1971;Shannon and McNab, 1972;Woodham and Deans, 1973;Van Weerden et al, 1970;Tajina et al, 1971;Yoshida, 1975).…”