00309nam 2217617 450000100060000000300230000600500090002900800410003808200120007910000390009126000240013024500350015417617StarLibrary Marc Built20180503201711 ||||| |||||||||||amh  a346.048 aJohn T. Maynard & Howard M. Petevs bu.s.a: a.c.s c1991 aUnderstanding Chemical Patents