00556nam a22001577a 4500008004100000040005500041080001800096245013000114260004200244300001000286490004800296500000600344650001200350653001400362700002200376230504b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  a542.97(05)b   aPhoto electronic image devicesc/ Proceedings of the fourth symposium held at imperial college, London, September 16-20, 1968  aNew York:   bAcademic Press,  c1969  a427p.  aAdvance in electronics and electron physics  a   aScience  aChemistry  aMcgee, J D (Ed.)