APA
Fletcher W.P, . (1950). Some problems involved in the grading and testing of natural rubber (The British Rubber Producers' Research Association, Publication No.137). : Rubber Chemistry and Technology.
Chicago
Fletcher W.P, . 1950. Some problems involved in the grading and testing of natural rubber (The British Rubber Producers' Research Association, Publication No.137). : Rubber Chemistry and Technology.
Harvard
Fletcher W.P, . (1950). Some problems involved in the grading and testing of natural rubber (The British Rubber Producers' Research Association, Publication No.137). : Rubber Chemistry and Technology.
MLA
Fletcher W.P, . Some problems involved in the grading and testing of natural rubber (The British Rubber Producers' Research Association, Publication No.137). : Rubber Chemistry and Technology. 1950.