Trading with the Soviet Union. March 28-29. World Trade Institute, World Trade Center, New York, N.Y. 10048. (212) 466-3169.

Foreign Trade Zones Seminar of the National Association of Foreign Trade Zones. March 29. Hyatt on Union Square, San Francisco. Contact NAFTZ, (202) 429-2020.Tour of Ro-Mar Terminals' Break Bulk Facility and Automated Warehouse. March 30. Ro-Mar Terminals, 90 Western Ave., Allston, Mass. Contact World Trade Center Boston, (617) 439-5280.

California Council for International Trade, annual luncheon meeting, featuring U.S. Commerce Secretary William Verity. March 30. St. Francis Hotel, San Francisco. Contact: California Council for International Trade, 100 Pine St., Suite 1250, San Francisco, Calif. 94111. (415) 788-4127.

Export Operations and Documentation/Letters of Credit, Methods of Payment and Export Finance. March 30-31. Marriott Hotel, Uniondale (Long Island), New York. (800) 521-4824.

U.S. Customs Rules, Regulations and Procedures for Importing Merchandise Produced in Twin-Plant Operations. March 30-31, Condado Beach Hotel, San Juan, Puerto Rico; April 5-6, Sheraton Hotel, Brickell Point, Miami, Fla. Contact Jackie Roth, Sandler & Travis Trade Advisory Services. (305) 358-2413.

The Impact of the Canadian Free Trade Agreement. March 31. Speakers include Canadian consul and senior trade commissioner Paul Donohue and U.S. Commerce Dept. free trade agreement specialist Bob Pata. Contact the San Francisco Chamber of Commerce's International Trade Council. (415) 624-1775.

Sixth International Conference on Gastronomy of the American Institute of Wine & Food. April 5-8. Equitable Center, The Parker Meridien, The Pierre, the Weill Recital Hall at Carnegie Hall and other locations in mid-Manhattan. contact Susy Davidson, Davidson Associates, 230 E. 73rd St., 3/F, New York, N.Y. 10021. (212) 879-2709.

Foreign Credit Insurance Orientation Seminars. April 5, June 2, Aug. 9, Oct. 6 and Dec. 13. Sponsored by the Foreign Credit Insurance Association. Contact Kathi Osborne, (212) 227-7020.

Export Control and Licensing. April 6. Houston, Texas. Contact the Houston World Trade Institute, (713) 225-0967.

Export Pacific 88: Pacific Rim Trade and Investment Conference and Exhibition. April 6-8. Hyatt Regency, San Francisco. Contact Meridian Pacific Group Inc., 116 E. Blithedale Ave., Suite 2, Mill Valley, Calif. 94941. (415) 381-2255. Telex: 358218 PACRIM UD.

International Productivity Symposium III. April 10-13. Washington, D.C. Contact IPS III Organizers, Institute of Industrial Engineers, 25 Technology Park/Atlanta, Norcross, Ga. 30092. (404) 449-0460.