1.
|
Buffalo, New York : The Patent and Trademark Office Society, 1968.
English | 47 US |
|
2.
|
Buffalo, New York : The Patent and Trademark Office Society, 1971.
English | 47 US |
|
3.
|
New York : Clark Boardman Co., 1975. Second edition.
Spanish | G 110 ROS.P |
|
4.
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New York : Clark Boardman Callaghan, 1975.
Spanish | G 110 ROS.P |
|