共 8 条
[1]
BARBER JC, 1964, SE10 US FOR SERV RES
[2]
BARBER JC, 1963, 7 P SOUTH TREE IMPR
[3]
COLE DE, 1963, 7 P SOUTH TREE IMPR
[4]
MARLER RL, 1963, 7 P SOUTH TREE IMPR
[5]
OTTERBACH PJ, 1963, 7 P SOUTH TREE IMPR
[6]
PERRY THOMAS O., 1958, JOUR FOREST, V56, P843
[7]
ZOBEL B, 1965, PERSONAL COMMUNICATI
[8]
1948, 64 US DEP AGR MISC P