00512cam a22001331  4500040000800000082002600008100003300034245017800067260003800245300004900283650001200332650001000344710002400354  cOAU  a582 ZIM 1964 C285 Or.1 aZimmermann, Martin Huldrych,14aThe formation of wood in forest trees;bthe second symposium held under the auspices of the Maria Moors Cabot Foundation for Botanical Research, Harvard Forest, April, 1963.  aNew York,bAcademic Press,c1964.  axv, 562 p.billus., diagrs., tables.c24 cm. 0aCambium 0aTrees2 aHarvard University.