Eastern Hemlock seeds and seedlings - response to photoperiod and temperature
Olson, Jerry S., Stearns, Forest W., Nienstaedt, Hons
Eastern Hemlock seeds and seedlings - response to photoperiod and temperature - New Haven 1959 - 1-70 p. - Connecticut Agricultural Experiment .
Eastern Hemlock seeds and seedlings - response to photoperiod and temperature - New Haven 1959 - 1-70 p. - Connecticut Agricultural Experiment .