00503nam a22001457a 4500 230801b |||||||| |||| 00| 0 eng d National Science Library National Science Library 59.5.132+595.76 L4 Biology and taxonomy of nematode parasites and associates of bark beetles in the United States Washington: US Department of Commerce, 1974 233p. Agriculture handbook no. 446 Handbook udc REF 56537 56537