Chart of 10° by 10° geographic 

 areas (Marsden Squares) within 

 which were collected data received by 

 NOAA's Environmental Data and Information 

 Service during the period January 

 1970-April 1978 (shaded squares) 

 resulting from IDOE-sponsored 

 research. 



96 



97 



T>U5.G0»EB««ENIPMNTI»GOFFICE:1978 O-Z8I-0S7 (278) 



